./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 01:55:17,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 01:55:17,084 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 01:55:17,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 01:55:17,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 01:55:17,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 01:55:17,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 01:55:17,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 01:55:17,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 01:55:17,110 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 01:55:17,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 01:55:17,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 01:55:17,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 01:55:17,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 01:55:17,113 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 01:55:17,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 01:55:17,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 01:55:17,114 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 01:55:17,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 01:55:17,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 01:55:17,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 01:55:17,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 01:55:17,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 01:55:17,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 01:55:17,118 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 01:55:17,118 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 01:55:17,118 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 01:55:17,118 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 01:55:17,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 01:55:17,119 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 01:55:17,119 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 01:55:17,119 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 01:55:17,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:55:17,120 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 01:55:17,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 01:55:17,121 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 01:55:17,121 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 01:55:17,121 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2024-10-14 01:55:17,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 01:55:17,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 01:55:17,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 01:55:17,345 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 01:55:17,345 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 01:55:17,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-14 01:55:19,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 01:55:19,718 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 01:55:19,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-14 01:55:19,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e759c1941/07bce3449ff448d4ad3063fcafd39940/FLAG47e90bf4d [2024-10-14 01:55:19,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e759c1941/07bce3449ff448d4ad3063fcafd39940 [2024-10-14 01:55:19,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 01:55:19,776 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 01:55:19,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 01:55:19,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 01:55:19,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 01:55:19,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:55:19" (1/1) ... [2024-10-14 01:55:19,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214acfdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:19, skipping insertion in model container [2024-10-14 01:55:19,785 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:55:19" (1/1) ... [2024-10-14 01:55:19,819 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 01:55:20,055 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-10-14 01:55:20,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:55:20,065 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 01:55:20,099 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-10-14 01:55:20,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:55:20,125 INFO L204 MainTranslator]: Completed translation [2024-10-14 01:55:20,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20 WrapperNode [2024-10-14 01:55:20,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 01:55:20,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 01:55:20,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 01:55:20,128 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 01:55:20,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,168 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2024-10-14 01:55:20,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 01:55:20,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 01:55:20,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 01:55:20,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 01:55:20,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,186 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,206 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 5, 6]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 4 writes are split as follows [0, 1, 3]. [2024-10-14 01:55:20,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,222 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 01:55:20,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 01:55:20,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 01:55:20,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 01:55:20,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (1/1) ... [2024-10-14 01:55:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:55:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:20,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 01:55:20,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 01:55:20,292 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-10-14 01:55:20,293 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-10-14 01:55:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 01:55:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2024-10-14 01:55:20,293 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2024-10-14 01:55:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 01:55:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 01:55:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-14 01:55:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 01:55:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 01:55:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 01:55:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 01:55:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 01:55:20,396 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 01:55:20,399 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 01:55:20,417 INFO L733 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-10-14 01:55:20,623 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-10-14 01:55:20,624 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 01:55:20,652 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 01:55:20,653 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 01:55:20,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:55:20 BoogieIcfgContainer [2024-10-14 01:55:20,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 01:55:20,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 01:55:20,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 01:55:20,661 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 01:55:20,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:55:19" (1/3) ... [2024-10-14 01:55:20,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33af5d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:55:20, skipping insertion in model container [2024-10-14 01:55:20,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:55:20" (2/3) ... [2024-10-14 01:55:20,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33af5d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:55:20, skipping insertion in model container [2024-10-14 01:55:20,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:55:20" (3/3) ... [2024-10-14 01:55:20,667 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2024-10-14 01:55:20,681 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 01:55:20,681 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 01:55:20,743 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 01:55:20,754 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;@2509594c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 01:55:20,754 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 01:55:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 01:55:20,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:20,766 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:20,766 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:20,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2097342563, now seen corresponding path program 1 times [2024-10-14 01:55:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848744910] [2024-10-14 01:55:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:20,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:20,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 01:55:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 01:55:20,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:20,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848744910] [2024-10-14 01:55:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848744910] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:20,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:55:20,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:55:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059604358] [2024-10-14 01:55:20,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:21,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 01:55:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 01:55:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 01:55:21,044 INFO L87 Difference]: Start difference. First operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:21,072 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2024-10-14 01:55:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 01:55:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-10-14 01:55:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:21,079 INFO L225 Difference]: With dead ends: 78 [2024-10-14 01:55:21,080 INFO L226 Difference]: Without dead ends: 32 [2024-10-14 01:55:21,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 01:55:21,084 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:21,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:55:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-14 01:55:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-14 01:55:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-14 01:55:21,110 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2024-10-14 01:55:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:21,111 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-14 01:55:21,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-14 01:55:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 01:55:21,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:21,113 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:21,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 01:55:21,113 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:21,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -594563149, now seen corresponding path program 1 times [2024-10-14 01:55:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479691298] [2024-10-14 01:55:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:21,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:21,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 01:55:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:55:21,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:21,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479691298] [2024-10-14 01:55:21,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479691298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:21,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386894068] [2024-10-14 01:55:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:21,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:21,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:21,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 01:55:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:21,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 01:55:21,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:21,616 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 01:55:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386894068] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:21,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 01:55:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-10-14 01:55:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128066485] [2024-10-14 01:55:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:21,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 01:55:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 01:55:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-14 01:55:21,621 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:21,685 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2024-10-14 01:55:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 01:55:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-14 01:55:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:21,687 INFO L225 Difference]: With dead ends: 59 [2024-10-14 01:55:21,687 INFO L226 Difference]: Without dead ends: 34 [2024-10-14 01:55:21,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-14 01:55:21,688 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:21,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-14 01:55:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-14 01:55:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-10-14 01:55:21,697 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 26 [2024-10-14 01:55:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:21,698 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-10-14 01:55:21,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-10-14 01:55:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 01:55:21,700 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:21,700 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:21,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:21,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:21,905 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:21,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 219365868, now seen corresponding path program 1 times [2024-10-14 01:55:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956815165] [2024-10-14 01:55:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 01:55:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956815165] [2024-10-14 01:55:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956815165] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:22,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:55:22,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 01:55:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721670978] [2024-10-14 01:55:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:22,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 01:55:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 01:55:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 01:55:22,040 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:22,136 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-10-14 01:55:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 01:55:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-10-14 01:55:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:22,138 INFO L225 Difference]: With dead ends: 57 [2024-10-14 01:55:22,138 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 01:55:22,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 01:55:22,140 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:22,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 01:55:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-10-14 01:55:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:55:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-10-14 01:55:22,147 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 30 [2024-10-14 01:55:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:22,147 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-10-14 01:55:22,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 01:55:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-10-14 01:55:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 01:55:22,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:22,150 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:22,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 01:55:22,150 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:22,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1789025124, now seen corresponding path program 1 times [2024-10-14 01:55:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:22,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348942077] [2024-10-14 01:55:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 01:55:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 01:55:22,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:22,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348942077] [2024-10-14 01:55:22,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348942077] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:22,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916367542] [2024-10-14 01:55:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:22,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:22,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:22,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 01:55:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:22,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 01:55:22,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:55:22,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 01:55:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916367542] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:22,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-10-14 01:55:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956167146] [2024-10-14 01:55:22,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:22,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 01:55:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 01:55:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-14 01:55:22,649 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:22,820 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2024-10-14 01:55:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 01:55:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-10-14 01:55:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:22,826 INFO L225 Difference]: With dead ends: 104 [2024-10-14 01:55:22,826 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 01:55:22,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-10-14 01:55:22,828 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:22,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 329 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 01:55:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-10-14 01:55:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:55:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-10-14 01:55:22,834 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2024-10-14 01:55:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:22,835 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-10-14 01:55:22,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-10-14 01:55:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 01:55:22,835 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:22,835 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:22,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:23,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-14 01:55:23,037 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:23,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1014395389, now seen corresponding path program 2 times [2024-10-14 01:55:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924881548] [2024-10-14 01:55:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:23,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:23,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:55:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:23,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924881548] [2024-10-14 01:55:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924881548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018230407] [2024-10-14 01:55:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:55:23,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:23,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:23,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 01:55:23,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:55:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:23,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 01:55:23,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:23,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 01:55:23,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-14 01:55:23,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-14 01:55:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:23,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:23,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-14 01:55:23,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 01:55:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018230407] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:23,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:23,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 13 [2024-10-14 01:55:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203872568] [2024-10-14 01:55:23,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:23,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 01:55:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 01:55:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-10-14 01:55:23,536 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:23,682 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-10-14 01:55:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 01:55:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2024-10-14 01:55:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:23,684 INFO L225 Difference]: With dead ends: 78 [2024-10-14 01:55:23,684 INFO L226 Difference]: Without dead ends: 74 [2024-10-14 01:55:23,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-14 01:55:23,685 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 38 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:23,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 262 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-14 01:55:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2024-10-14 01:55:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 01:55:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-10-14 01:55:23,692 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 35 [2024-10-14 01:55:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:23,692 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-10-14 01:55:23,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-10-14 01:55:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 01:55:23,693 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:23,693 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:23,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 01:55:23,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:23,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:23,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1380918427, now seen corresponding path program 3 times [2024-10-14 01:55:23,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:23,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997153033] [2024-10-14 01:55:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:23,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:24,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:24,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:55:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:55:24,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:24,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997153033] [2024-10-14 01:55:24,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997153033] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:24,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455371159] [2024-10-14 01:55:24,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 01:55:24,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:24,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:24,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 01:55:24,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 01:55:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:24,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 01:55:24,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 01:55:24,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:55:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455371159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:24,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:24,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2024-10-14 01:55:24,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416255382] [2024-10-14 01:55:24,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:24,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 01:55:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 01:55:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-10-14 01:55:24,530 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:24,766 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2024-10-14 01:55:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 01:55:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-14 01:55:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:24,774 INFO L225 Difference]: With dead ends: 164 [2024-10-14 01:55:24,775 INFO L226 Difference]: Without dead ends: 160 [2024-10-14 01:55:24,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-10-14 01:55:24,776 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:24,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 439 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:55:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-14 01:55:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 113. [2024-10-14 01:55:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 102 states have internal predecessors, (126), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-14 01:55:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2024-10-14 01:55:24,795 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 36 [2024-10-14 01:55:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:24,795 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2024-10-14 01:55:24,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2024-10-14 01:55:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 01:55:24,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:24,797 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:24,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:25,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:25,001 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:25,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 141769283, now seen corresponding path program 4 times [2024-10-14 01:55:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719024514] [2024-10-14 01:55:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:25,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:25,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:55:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719024514] [2024-10-14 01:55:25,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719024514] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:25,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376494483] [2024-10-14 01:55:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 01:55:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:25,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:25,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 01:55:25,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 01:55:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:25,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-14 01:55:25,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:25,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:55:25,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:55:25,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:55:25,660 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 01:55:25,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 01:55:25,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-14 01:55:25,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-10-14 01:55:25,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2024-10-14 01:55:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:55:25,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:26,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2024-10-14 01:55:26,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2024-10-14 01:55:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376494483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:38,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2024-10-14 01:55:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507125909] [2024-10-14 01:55:38,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:38,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 01:55:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 01:55:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=402, Unknown=3, NotChecked=0, Total=462 [2024-10-14 01:55:38,436 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:38,825 INFO L93 Difference]: Finished difference Result 175 states and 231 transitions. [2024-10-14 01:55:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 01:55:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-10-14 01:55:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:38,826 INFO L225 Difference]: With dead ends: 175 [2024-10-14 01:55:38,826 INFO L226 Difference]: Without dead ends: 166 [2024-10-14 01:55:38,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=85, Invalid=562, Unknown=3, NotChecked=0, Total=650 [2024-10-14 01:55:38,827 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:38,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 434 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 01:55:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-14 01:55:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2024-10-14 01:55:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 132 states have internal predecessors, (160), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2024-10-14 01:55:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2024-10-14 01:55:38,845 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 37 [2024-10-14 01:55:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:38,846 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2024-10-14 01:55:38,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2024-10-14 01:55:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 01:55:38,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:38,847 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:39,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:39,048 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:39,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1235825357, now seen corresponding path program 1 times [2024-10-14 01:55:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:39,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032795058] [2024-10-14 01:55:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:39,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:39,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:55:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032795058] [2024-10-14 01:55:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032795058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384197343] [2024-10-14 01:55:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:39,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:39,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:39,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 01:55:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:39,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 01:55:39,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:39,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384197343] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:39,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-10-14 01:55:39,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074918273] [2024-10-14 01:55:39,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:39,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 01:55:39,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 01:55:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-10-14 01:55:39,823 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 01:55:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:40,245 INFO L93 Difference]: Finished difference Result 285 states and 402 transitions. [2024-10-14 01:55:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 01:55:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2024-10-14 01:55:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:40,248 INFO L225 Difference]: With dead ends: 285 [2024-10-14 01:55:40,248 INFO L226 Difference]: Without dead ends: 212 [2024-10-14 01:55:40,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 01:55:40,250 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:40,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 403 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:55:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-10-14 01:55:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2024-10-14 01:55:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 152 states have internal predecessors, (188), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 10 states have call predecessors, (32), 13 states have call successors, (32) [2024-10-14 01:55:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 233 transitions. [2024-10-14 01:55:40,287 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 233 transitions. Word has length 39 [2024-10-14 01:55:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:40,288 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 233 transitions. [2024-10-14 01:55:40,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 01:55:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 233 transitions. [2024-10-14 01:55:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 01:55:40,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:40,289 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:40,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 01:55:40,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:40,497 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:40,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash 649019343, now seen corresponding path program 1 times [2024-10-14 01:55:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12359302] [2024-10-14 01:55:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:40,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:40,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:55:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:40,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12359302] [2024-10-14 01:55:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12359302] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597330167] [2024-10-14 01:55:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:40,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:40,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:40,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 01:55:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:40,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 01:55:40,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:41,123 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 01:55:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597330167] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:55:41,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 01:55:41,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2024-10-14 01:55:41,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809252499] [2024-10-14 01:55:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:55:41,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 01:55:41,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 01:55:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-14 01:55:41,128 INFO L87 Difference]: Start difference. First operand 167 states and 233 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 01:55:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:41,278 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2024-10-14 01:55:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 01:55:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-10-14 01:55:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:41,280 INFO L225 Difference]: With dead ends: 197 [2024-10-14 01:55:41,280 INFO L226 Difference]: Without dead ends: 185 [2024-10-14 01:55:41,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-14 01:55:41,281 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:41,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 211 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-14 01:55:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2024-10-14 01:55:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 154 states have internal predecessors, (192), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 12 states have call predecessors, (32), 13 states have call successors, (32) [2024-10-14 01:55:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2024-10-14 01:55:41,305 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 39 [2024-10-14 01:55:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:41,305 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2024-10-14 01:55:41,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 01:55:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2024-10-14 01:55:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 01:55:41,308 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:41,308 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:41,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 01:55:41,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:41,514 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:41,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash -628111627, now seen corresponding path program 2 times [2024-10-14 01:55:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854514242] [2024-10-14 01:55:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:41,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:41,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:41,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 01:55:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 01:55:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854514242] [2024-10-14 01:55:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854514242] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779274856] [2024-10-14 01:55:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:55:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:41,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:41,790 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:41,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 01:55:41,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:55:41,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:41,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 01:55:41,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 01:55:42,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 01:55:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779274856] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:42,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:42,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-10-14 01:55:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844955560] [2024-10-14 01:55:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:42,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 01:55:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 01:55:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-10-14 01:55:42,158 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:42,369 INFO L93 Difference]: Finished difference Result 240 states and 333 transitions. [2024-10-14 01:55:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 01:55:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-14 01:55:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:42,371 INFO L225 Difference]: With dead ends: 240 [2024-10-14 01:55:42,371 INFO L226 Difference]: Without dead ends: 170 [2024-10-14 01:55:42,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-10-14 01:55:42,376 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:42,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 362 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-14 01:55:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2024-10-14 01:55:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 141 states have (on average 1.297872340425532) internal successors, (183), 147 states have internal predecessors, (183), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2024-10-14 01:55:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2024-10-14 01:55:42,394 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 39 [2024-10-14 01:55:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:42,394 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2024-10-14 01:55:42,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2024-10-14 01:55:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 01:55:42,396 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:42,396 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:42,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:42,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-14 01:55:42,597 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:42,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2129541738, now seen corresponding path program 5 times [2024-10-14 01:55:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:42,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679337077] [2024-10-14 01:55:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:42,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:42,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-14 01:55:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:55:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679337077] [2024-10-14 01:55:42,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679337077] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10256992] [2024-10-14 01:55:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 01:55:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:42,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:42,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 01:55:42,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-14 01:55:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:42,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 01:55:42,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:55:43,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:55:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10256992] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:43,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2024-10-14 01:55:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363415377] [2024-10-14 01:55:43,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:43,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 01:55:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 01:55:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-14 01:55:43,144 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:43,336 INFO L93 Difference]: Finished difference Result 258 states and 358 transitions. [2024-10-14 01:55:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 01:55:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-10-14 01:55:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:43,338 INFO L225 Difference]: With dead ends: 258 [2024-10-14 01:55:43,338 INFO L226 Difference]: Without dead ends: 159 [2024-10-14 01:55:43,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-14 01:55:43,339 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:43,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 406 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:55:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-10-14 01:55:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2024-10-14 01:55:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 131 states have internal predecessors, (163), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2024-10-14 01:55:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2024-10-14 01:55:43,349 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 41 [2024-10-14 01:55:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:43,349 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2024-10-14 01:55:43,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2024-10-14 01:55:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 01:55:43,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:43,350 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:43,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 01:55:43,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:43,551 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:43,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1890606574, now seen corresponding path program 3 times [2024-10-14 01:55:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235105224] [2024-10-14 01:55:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:43,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:43,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 01:55:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235105224] [2024-10-14 01:55:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235105224] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279299153] [2024-10-14 01:55:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 01:55:43,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:43,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:43,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 01:55:44,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 01:55:44,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:44,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-14 01:55:44,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:44,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:55:44,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 01:55:44,124 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 01:55:44,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 01:55:44,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 01:55:44,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 01:55:44,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-10-14 01:55:44,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2024-10-14 01:55:44,428 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-14 01:55:44,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2024-10-14 01:55:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 01:55:44,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:44,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2024-10-14 01:55:44,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-10-14 01:55:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279299153] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:44,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2024-10-14 01:55:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718292155] [2024-10-14 01:55:44,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:44,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 01:55:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 01:55:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-10-14 01:55:44,610 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:45,055 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2024-10-14 01:55:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 01:55:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-10-14 01:55:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:45,057 INFO L225 Difference]: With dead ends: 165 [2024-10-14 01:55:45,057 INFO L226 Difference]: Without dead ends: 161 [2024-10-14 01:55:45,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2024-10-14 01:55:45,058 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:45,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 635 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 01:55:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-14 01:55:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2024-10-14 01:55:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.28125) internal successors, (164), 132 states have internal predecessors, (164), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2024-10-14 01:55:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 196 transitions. [2024-10-14 01:55:45,068 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 196 transitions. Word has length 43 [2024-10-14 01:55:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:45,069 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 196 transitions. [2024-10-14 01:55:45,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 01:55:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 196 transitions. [2024-10-14 01:55:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-14 01:55:45,070 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:45,070 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:45,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 01:55:45,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 01:55:45,271 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:45,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1520170790, now seen corresponding path program 4 times [2024-10-14 01:55:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:45,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320202153] [2024-10-14 01:55:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:45,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:45,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 01:55:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 01:55:45,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320202153] [2024-10-14 01:55:45,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320202153] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680948644] [2024-10-14 01:55:45,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 01:55:45,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:45,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:45,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:45,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 01:55:45,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 01:55:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:45,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-14 01:55:45,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-14 01:55:46,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 01:55:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680948644] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:55:46,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:55:46,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2024-10-14 01:55:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571459472] [2024-10-14 01:55:46,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:55:46,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 01:55:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:55:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 01:55:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 01:55:46,448 INFO L87 Difference]: Start difference. First operand 147 states and 196 transitions. Second operand has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:55:47,148 INFO L93 Difference]: Finished difference Result 265 states and 376 transitions. [2024-10-14 01:55:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 01:55:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-10-14 01:55:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:55:47,151 INFO L225 Difference]: With dead ends: 265 [2024-10-14 01:55:47,151 INFO L226 Difference]: Without dead ends: 261 [2024-10-14 01:55:47,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 01:55:47,152 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 86 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 01:55:47,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1146 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 01:55:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-10-14 01:55:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 195. [2024-10-14 01:55:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 171 states have (on average 1.263157894736842) internal successors, (216), 176 states have internal predecessors, (216), 14 states have call successors, (14), 4 states have call predecessors, (14), 9 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2024-10-14 01:55:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 255 transitions. [2024-10-14 01:55:47,175 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 255 transitions. Word has length 44 [2024-10-14 01:55:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:55:47,175 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 255 transitions. [2024-10-14 01:55:47,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:55:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 255 transitions. [2024-10-14 01:55:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 01:55:47,176 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:55:47,176 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:55:47,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 01:55:47,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 01:55:47,381 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:55:47,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:55:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 119913326, now seen corresponding path program 5 times [2024-10-14 01:55:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:55:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841125749] [2024-10-14 01:55:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:55:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:55:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:48,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:55:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:48,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 01:55:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:55:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:55:48,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:55:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841125749] [2024-10-14 01:55:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841125749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:55:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314945591] [2024-10-14 01:55:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 01:55:48,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:55:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:55:48,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:55:48,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 01:55:48,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-14 01:55:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:55:48,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-14 01:55:48,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:55:48,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:55:48,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:55:48,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:55:48,399 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-14 01:55:48,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-14 01:55:48,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-10-14 01:55:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-14 01:55:48,546 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-14 01:55:48,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-10-14 01:55:48,659 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-10-14 01:55:48,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-10-14 01:55:48,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-10-14 01:55:49,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 80 [2024-10-14 01:55:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 01:55:49,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:55:49,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 100 [2024-10-14 01:55:49,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2024-10-14 01:55:53,670 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (select (let ((.cse0 (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (let ((.cse1 (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0))))) is different from false [2024-10-14 01:56:02,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:56:02,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9788 treesize of output 8772 [2024-10-14 01:56:03,382 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:56:03,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2238 treesize of output 2110 [2024-10-14 01:56:03,403 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:56:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2024-10-14 01:56:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314945591] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:04,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:04,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2024-10-14 01:56:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355137733] [2024-10-14 01:56:04,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:04,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-14 01:56:04,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-14 01:56:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1034, Unknown=3, NotChecked=64, Total=1190 [2024-10-14 01:56:04,249 INFO L87 Difference]: Start difference. First operand 195 states and 255 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:56:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:41,478 INFO L93 Difference]: Finished difference Result 261 states and 337 transitions. [2024-10-14 01:56:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 01:56:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-10-14 01:56:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:41,480 INFO L225 Difference]: With dead ends: 261 [2024-10-14 01:56:41,480 INFO L226 Difference]: Without dead ends: 251 [2024-10-14 01:56:41,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=131, Invalid=1352, Unknown=3, NotChecked=74, Total=1560 [2024-10-14 01:56:41,481 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 71 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:41,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1193 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 812 Invalid, 0 Unknown, 59 Unchecked, 0.8s Time] [2024-10-14 01:56:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-10-14 01:56:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2024-10-14 01:56:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 201 states have (on average 1.2587064676616915) internal successors, (253), 208 states have internal predecessors, (253), 18 states have call successors, (18), 5 states have call predecessors, (18), 11 states have return successors, (33), 17 states have call predecessors, (33), 18 states have call successors, (33) [2024-10-14 01:56:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2024-10-14 01:56:41,498 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 45 [2024-10-14 01:56:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:41,499 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2024-10-14 01:56:41,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:56:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2024-10-14 01:56:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-14 01:56:41,500 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:41,500 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:41,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 01:56:41,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 01:56:41,704 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:41,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1285973098, now seen corresponding path program 6 times [2024-10-14 01:56:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165981955] [2024-10-14 01:56:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:41,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:56:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:41,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-14 01:56:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:56:41,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165981955] [2024-10-14 01:56:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165981955] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974206161] [2024-10-14 01:56:41,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 01:56:41,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:41,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:41,912 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:41,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 01:56:42,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-14 01:56:42,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:42,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 01:56:42,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:56:42,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:56:42,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974206161] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:42,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:42,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2024-10-14 01:56:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521941681] [2024-10-14 01:56:42,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:42,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 01:56:42,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 01:56:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-10-14 01:56:42,322 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:56:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:42,615 INFO L93 Difference]: Finished difference Result 303 states and 410 transitions. [2024-10-14 01:56:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 01:56:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2024-10-14 01:56:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:42,616 INFO L225 Difference]: With dead ends: 303 [2024-10-14 01:56:42,616 INFO L226 Difference]: Without dead ends: 246 [2024-10-14 01:56:42,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-10-14 01:56:42,617 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:42,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 486 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:56:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-10-14 01:56:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 222. [2024-10-14 01:56:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 193 states have (on average 1.2590673575129534) internal successors, (243), 200 states have internal predecessors, (243), 17 states have call successors, (17), 5 states have call predecessors, (17), 11 states have return successors, (31), 16 states have call predecessors, (31), 17 states have call successors, (31) [2024-10-14 01:56:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 291 transitions. [2024-10-14 01:56:42,642 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 291 transitions. Word has length 47 [2024-10-14 01:56:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:42,644 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 291 transitions. [2024-10-14 01:56:42,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:56:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 291 transitions. [2024-10-14 01:56:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 01:56:42,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:42,645 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:42,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 01:56:42,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 01:56:42,846 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:42,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1353750673, now seen corresponding path program 1 times [2024-10-14 01:56:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673626233] [2024-10-14 01:56:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:42,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:56:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:42,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 01:56:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-14 01:56:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 01:56:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673626233] [2024-10-14 01:56:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673626233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908305840] [2024-10-14 01:56:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:43,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:43,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 01:56:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 01:56:43,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:56:43,296 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 01:56:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908305840] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:56:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 01:56:43,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-14 01:56:43,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738817253] [2024-10-14 01:56:43,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:56:43,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 01:56:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 01:56:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-14 01:56:43,298 INFO L87 Difference]: Start difference. First operand 222 states and 291 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 01:56:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:43,369 INFO L93 Difference]: Finished difference Result 301 states and 392 transitions. [2024-10-14 01:56:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 01:56:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-10-14 01:56:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:43,370 INFO L225 Difference]: With dead ends: 301 [2024-10-14 01:56:43,371 INFO L226 Difference]: Without dead ends: 171 [2024-10-14 01:56:43,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-14 01:56:43,372 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:43,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:56:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-14 01:56:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2024-10-14 01:56:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 147 states have internal predecessors, (174), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-10-14 01:56:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2024-10-14 01:56:43,387 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 50 [2024-10-14 01:56:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:43,388 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2024-10-14 01:56:43,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 01:56:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2024-10-14 01:56:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-14 01:56:43,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:43,389 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:43,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 01:56:43,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:43,590 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:43,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash -538086489, now seen corresponding path program 7 times [2024-10-14 01:56:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853182978] [2024-10-14 01:56:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:56:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 01:56:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 01:56:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853182978] [2024-10-14 01:56:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853182978] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592975005] [2024-10-14 01:56:43,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 01:56:43,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:43,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:43,761 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:43,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 01:56:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:43,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 01:56:43,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 01:56:43,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 01:56:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592975005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:44,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2024-10-14 01:56:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710481570] [2024-10-14 01:56:44,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:44,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 01:56:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 01:56:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-14 01:56:44,089 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:56:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:44,311 INFO L93 Difference]: Finished difference Result 239 states and 304 transitions. [2024-10-14 01:56:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 01:56:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-10-14 01:56:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:44,312 INFO L225 Difference]: With dead ends: 239 [2024-10-14 01:56:44,312 INFO L226 Difference]: Without dead ends: 179 [2024-10-14 01:56:44,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-10-14 01:56:44,313 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:44,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 412 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:56:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-10-14 01:56:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2024-10-14 01:56:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 138 states have internal predecessors, (163), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-14 01:56:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2024-10-14 01:56:44,331 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 49 [2024-10-14 01:56:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:44,332 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2024-10-14 01:56:44,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 01:56:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2024-10-14 01:56:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-14 01:56:44,333 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:44,333 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:44,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 01:56:44,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 01:56:44,538 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:44,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1012795119, now seen corresponding path program 8 times [2024-10-14 01:56:44,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838628959] [2024-10-14 01:56:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:45,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:56:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:45,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-14 01:56:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 01:56:45,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:45,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838628959] [2024-10-14 01:56:45,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838628959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:45,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303550157] [2024-10-14 01:56:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:56:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:45,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:45,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 01:56:45,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:56:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:45,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-14 01:56:45,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:45,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 01:56:45,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:56:45,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:56:45,472 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-10-14 01:56:45,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-10-14 01:56:45,606 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 01:56:45,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 01:56:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-14 01:56:45,787 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-10-14 01:56:45,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2024-10-14 01:56:46,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 54 [2024-10-14 01:56:46,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-10-14 01:56:46,332 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-10-14 01:56:46,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2024-10-14 01:56:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:56:46,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:46,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2024-10-14 01:56:46,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 52 [2024-10-14 01:56:46,741 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:56:46,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 01:56:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 01:56:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 01:56:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303550157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:46,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:46,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 33 [2024-10-14 01:56:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750910742] [2024-10-14 01:56:46,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:46,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 01:56:46,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 01:56:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 01:56:46,846 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:56:50,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 01:56:54,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 01:56:59,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]