./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-simple/sll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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-simple/sll2c_prepend_unequal.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 f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:25:47,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:25:47,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:25:47,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:25:47,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:25:47,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:25:47,730 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:25:47,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:25:47,731 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:25:47,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:25:47,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:25:47,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:25:47,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:25:47,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:25:47,738 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:25:47,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:25:47,739 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:25:47,740 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:25:47,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:25:47,740 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:25:47,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:25:47,741 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:25:47,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:25:47,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:25:47,742 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:25:47,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:25:47,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:25:47,742 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:25:47,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:25:47,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:25:47,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:25:47,743 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:25:47,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:25:47,744 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:25:47,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:25:47,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:25:47,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:25:47,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:25:47,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:25:47,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:25:47,747 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:25:47,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:25:47,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2024-10-12 18:25:48,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:25:48,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:25:48,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:25:48,069 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:25:48,069 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:25:48,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2024-10-12 18:25:49,560 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:25:49,824 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:25:49,825 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2024-10-12 18:25:49,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42d8b98f2/30e4010af04044ce9c651f2c51016b24/FLAGf92639963 [2024-10-12 18:25:49,850 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42d8b98f2/30e4010af04044ce9c651f2c51016b24 [2024-10-12 18:25:49,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:25:49,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:25:49,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:25:49,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:25:49,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:25:49,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:25:49" (1/1) ... [2024-10-12 18:25:49,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78392aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:49, skipping insertion in model container [2024-10-12 18:25:49,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:25:49" (1/1) ... [2024-10-12 18:25:49,907 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:25:50,246 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-simple/sll2c_prepend_unequal.i[24547,24560] [2024-10-12 18:25:50,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:25:50,262 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:25:50,314 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-simple/sll2c_prepend_unequal.i[24547,24560] [2024-10-12 18:25:50,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:25:50,347 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:25:50,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50 WrapperNode [2024-10-12 18:25:50,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:25:50,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:25:50,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:25:50,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:25:50,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,419 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2024-10-12 18:25:50,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:25:50,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:25:50,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:25:50,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:25:50,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,441 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,481 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 15, 10]. 56 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 9 writes are split as follows [0, 7, 2]. [2024-10-12 18:25:50,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,507 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,515 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:25:50,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:25:50,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:25:50,525 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:25:50,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (1/1) ... [2024-10-12 18:25:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:25:50,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:25:50,567 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) [2024-10-12 18:25:50,570 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 [2024-10-12 18:25:50,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 18:25:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-10-12 18:25:50,626 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-10-12 18:25:50,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 18:25:50,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:25:50,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 18:25:50,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-12 18:25:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-12 18:25:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-12 18:25:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-12 18:25:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-12 18:25:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:25:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 18:25:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 18:25:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:25:50,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:25:50,794 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:25:50,796 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:25:51,119 INFO L? ?]: Removed 49 outVars from TransFormulas that were not future-live. [2024-10-12 18:25:51,119 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:25:51,155 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:25:51,156 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-12 18:25:51,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:25:51 BoogieIcfgContainer [2024-10-12 18:25:51,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:25:51,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:25:51,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:25:51,162 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:25:51,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:25:49" (1/3) ... [2024-10-12 18:25:51,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709cb4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:25:51, skipping insertion in model container [2024-10-12 18:25:51,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:25:50" (2/3) ... [2024-10-12 18:25:51,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709cb4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:25:51, skipping insertion in model container [2024-10-12 18:25:51,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:25:51" (3/3) ... [2024-10-12 18:25:51,166 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2024-10-12 18:25:51,187 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:25:51,188 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:25:51,262 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:25:51,272 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;@708327f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:25:51,272 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:25:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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) [2024-10-12 18:25:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:25:51,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:25:51,291 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:25:51,291 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:25:51,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:25:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1425185690, now seen corresponding path program 1 times [2024-10-12 18:25:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:25:51,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379963403] [2024-10-12 18:25:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:25:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:51,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:25:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:51,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 18:25:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:25:51,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:25:51,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379963403] [2024-10-12 18:25:51,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379963403] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:25:51,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:25:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:25:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943696631] [2024-10-12 18:25:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:25:51,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:25:51,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:25:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:25:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:25:51,696 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-12 18:25:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:25:51,784 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2024-10-12 18:25:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:25:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2024-10-12 18:25:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:25:51,800 INFO L225 Difference]: With dead ends: 56 [2024-10-12 18:25:51,801 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 18:25:51,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:25:51,811 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:25:51,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:25:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 18:25:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-12 18:25:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2024-10-12 18:25:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-12 18:25:51,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 17 [2024-10-12 18:25:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:25:51,846 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-12 18:25:51,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-12 18:25:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-12 18:25:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:25:51,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:25:51,848 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:25:51,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:25:51,848 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:25:51,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:25:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash 766587872, now seen corresponding path program 1 times [2024-10-12 18:25:51,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:25:51,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059680405] [2024-10-12 18:25:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:25:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:25:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 18:25:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:25:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:25:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059680405] [2024-10-12 18:25:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059680405] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:25:52,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:25:52,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:25:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999383806] [2024-10-12 18:25:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:25:52,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:25:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:25:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:25:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:25:52,137 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-10-12 18:25:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:25:52,200 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-10-12 18:25:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 18:25:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 17 [2024-10-12 18:25:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:25:52,204 INFO L225 Difference]: With dead ends: 45 [2024-10-12 18:25:52,204 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:25:52,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 18:25:52,206 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:25:52,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:25:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:25:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-10-12 18:25:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2024-10-12 18:25:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-12 18:25:52,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2024-10-12 18:25:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:25:52,218 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-12 18:25:52,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-10-12 18:25:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-12 18:25:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:25:52,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:25:52,221 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:25:52,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:25:52,223 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:25:52,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:25:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash 650879369, now seen corresponding path program 1 times [2024-10-12 18:25:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:25:52,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849925956] [2024-10-12 18:25:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:25:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:25:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:25:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:25:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:25:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:25:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849925956] [2024-10-12 18:25:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849925956] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:25:52,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589769146] [2024-10-12 18:25:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:52,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:25:52,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:25:52,815 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) [2024-10-12 18:25:52,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:25:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:53,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-12 18:25:53,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:25:53,163 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 13 treesize of output 9 [2024-10-12 18:25:53,281 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 [2024-10-12 18:25:53,287 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 [2024-10-12 18:25:53,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2024-10-12 18:25:53,325 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 35 treesize of output 27 [2024-10-12 18:25:53,329 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 27 treesize of output 19 [2024-10-12 18:25:53,332 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 19 treesize of output 7 [2024-10-12 18:25:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 18:25:53,352 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:25:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589769146] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:25:53,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:25:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-10-12 18:25:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024379468] [2024-10-12 18:25:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:25:53,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 18:25:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:25:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 18:25:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2024-10-12 18:25:53,354 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:25:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:25:53,531 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-10-12 18:25:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 18:25:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-12 18:25:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:25:53,533 INFO L225 Difference]: With dead ends: 29 [2024-10-12 18:25:53,533 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:25:53,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-10-12 18:25:53,536 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:25:53,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:25:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:25:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-12 18:25:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:25:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-12 18:25:53,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 23 [2024-10-12 18:25:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:25:53,548 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-12 18:25:53,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:25:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-12 18:25:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 18:25:53,550 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:25:53,550 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:25:53,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:25:53,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:25:53,751 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:25:53,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:25:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1570130556, now seen corresponding path program 1 times [2024-10-12 18:25:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:25:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162216065] [2024-10-12 18:25:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:25:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:54,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:25:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:54,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:25:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:54,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:25:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:25:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:25:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162216065] [2024-10-12 18:25:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162216065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:25:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189302433] [2024-10-12 18:25:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:25:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:25:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:25:54,127 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) [2024-10-12 18:25:54,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:25:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:25:54,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 18:25:54,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:25:54,405 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 [2024-10-12 18:25:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:25:54,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:25:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 18:25:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189302433] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:25:54,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:25:54,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 12 [2024-10-12 18:25:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835706056] [2024-10-12 18:25:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:25:54,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 18:25:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:25:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 18:25:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-10-12 18:25:54,472 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-12 18:25:58,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:02,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:06,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:10,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:14,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:18,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 18:26:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:26:18,749 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-12 18:26:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 18:26:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2024-10-12 18:26:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:26:18,750 INFO L225 Difference]: With dead ends: 38 [2024-10-12 18:26:18,750 INFO L226 Difference]: Without dead ends: 30 [2024-10-12 18:26:18,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-10-12 18:26:18,752 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:26:18,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 195 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 6 Unknown, 0 Unchecked, 24.2s Time] [2024-10-12 18:26:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-12 18:26:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-10-12 18:26:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-10-12 18:26:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-10-12 18:26:18,764 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2024-10-12 18:26:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:26:18,768 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-10-12 18:26:18,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-12 18:26:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-10-12 18:26:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:26:18,769 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:26:18,769 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:26:18,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:26:18,970 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 [2024-10-12 18:26:18,971 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:26:18,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:26:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash 18333322, now seen corresponding path program 1 times [2024-10-12 18:26:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:26:18,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108802145] [2024-10-12 18:26:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:18,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:26:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:19,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:26:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:20,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:26:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:20,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:26:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:26:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:26:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108802145] [2024-10-12 18:26:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108802145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791285499] [2024-10-12 18:26:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:20,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:26:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:26:20,228 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) [2024-10-12 18:26:20,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:26:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:20,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-12 18:26:20,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:26:20,404 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 [2024-10-12 18:26:20,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-10-12 18:26:20,571 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 13 treesize of output 9 [2024-10-12 18:26:20,632 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-10-12 18:26:20,632 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 15 treesize of output 15 [2024-10-12 18:26:20,857 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 81 treesize of output 40 [2024-10-12 18:26:20,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 21 [2024-10-12 18:26:20,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 8 [2024-10-12 18:26:20,873 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 [2024-10-12 18:26:20,910 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 35 treesize of output 27 [2024-10-12 18:26:20,917 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 27 treesize of output 19 [2024-10-12 18:26:20,919 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 19 treesize of output 7 [2024-10-12 18:26:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:26:20,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:26:20,969 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 76 treesize of output 72 [2024-10-12 18:26:21,089 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) (.cse6 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse3 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse4 (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (or (not (= v_ArrVal_636 (store .cse1 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_638) .cse6) (+ 4 v_arrayElimCell_15)))))) (.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4))) (and (or (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int))) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_638) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) .cse0)) (not (= v_ArrVal_636 (store .cse1 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))))) (not .cse2) (not .cse3)) (or .cse4 .cse3) (or .cse4 .cse2) (forall ((v_ArrVal_636 (Array Int Int))) (or (not (= v_ArrVal_636 (store .cse1 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))) (forall ((v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (let ((.cse5 (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_638))) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse5 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse5 .cse6) (+ 4 v_arrayElimCell_15))))))))))) is different from false [2024-10-12 18:26:21,273 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|))) (let ((.cse3 (select |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) (.cse8 (select .cse5 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse7 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse1 (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (or (not (= v_ArrVal_636 (store .cse3 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) .cse8 v_ArrVal_638) .cse7) (+ 4 v_arrayElimCell_15)))))) (.cse0 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| 4))) (and (or .cse0 .cse1) (or .cse2 .cse1) (forall ((v_ArrVal_636 (Array Int Int))) (or (not (= v_ArrVal_636 (store .cse3 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))) (forall ((v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (let ((.cse4 (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) .cse8 v_ArrVal_638))) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse4 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse5 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse6)) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse4 .cse7) (+ 4 v_arrayElimCell_15)))))))) (or (not .cse0) (not .cse2) (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int))) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_636) .cse8 v_ArrVal_638) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) .cse6)) (not (= v_ArrVal_636 (store .cse3 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|))))))))))) is different from false [2024-10-12 18:26:21,354 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse6 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|))) (let ((.cse4 (+ |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| 4)) (.cse0 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse8 (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| v_ArrVal_636) .cse3 v_ArrVal_638) .cse6) (+ 4 v_arrayElimCell_15))) (not (= v_ArrVal_636 (store .cse2 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset|)))))))) (and (or (not .cse0) (not .cse1) (forall ((v_ArrVal_636 (Array Int Int)) (v_ArrVal_638 (Array Int Int))) (or (not (= v_ArrVal_636 (store .cse2 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset|)))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| v_ArrVal_636) .cse3 v_ArrVal_638) |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) .cse4))))) (forall ((v_ArrVal_636 (Array Int Int))) (or (not (= v_ArrVal_636 (store .cse2 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| (select v_ArrVal_636 |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset|)))) (forall ((v_ArrVal_638 (Array Int Int)) (v_arrayElimCell_15 Int)) (let ((.cse5 (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| v_ArrVal_636) .cse3 v_ArrVal_638))) (or (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse5 .cse6) (+ 4 v_arrayElimCell_15))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select .cse5 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse4))))))) (or .cse0 .cse8) (or .cse1 .cse8))))) is different from false [2024-10-12 18:26:21,483 INFO L349 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2024-10-12 18:26:21,484 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 882 treesize of output 867 [2024-10-12 18:26:21,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:21,513 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 526 treesize of output 519 [2024-10-12 18:26:21,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 502 [2024-10-12 18:26:21,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 502 treesize of output 498 [2024-10-12 18:26:21,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 490 [2024-10-12 18:26:22,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2024-10-12 18:26:22,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-10-12 18:26:22,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2024-10-12 18:26:22,300 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,317 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-10-12 18:26:22,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2024-10-12 18:26:22,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2024-10-12 18:26:22,418 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,424 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,429 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,435 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-12 18:26:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791285499] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:22,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:26:22,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2024-10-12 18:26:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378548906] [2024-10-12 18:26:22,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:26:22,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-12 18:26:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:26:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-12 18:26:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=749, Unknown=3, NotChecked=168, Total=992 [2024-10-12 18:26:22,509 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 28 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 18:26:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:26:23,258 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-12 18:26:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-12 18:26:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2024-10-12 18:26:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:26:23,260 INFO L225 Difference]: With dead ends: 55 [2024-10-12 18:26:23,260 INFO L226 Difference]: Without dead ends: 46 [2024-10-12 18:26:23,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=1222, Unknown=3, NotChecked=216, Total=1560 [2024-10-12 18:26:23,262 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:26:23,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 328 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:26:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-12 18:26:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-10-12 18:26:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:26:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-12 18:26:23,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 26 [2024-10-12 18:26:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:26:23,271 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-12 18:26:23,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 18:26:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-12 18:26:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:26:23,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:26:23,272 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:26:23,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:26:23,472 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 [2024-10-12 18:26:23,473 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:26:23,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:26:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1948213679, now seen corresponding path program 1 times [2024-10-12 18:26:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:26:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767930864] [2024-10-12 18:26:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:26:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:25,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:26:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:25,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:26:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:25,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:26:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:26:25,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:26:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767930864] [2024-10-12 18:26:25,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767930864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359738597] [2024-10-12 18:26:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:26:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:26:25,455 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) [2024-10-12 18:26:25,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:26:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:25,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-12 18:26:25,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:26:25,636 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 [2024-10-12 18:26:25,870 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:26:25,871 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 [2024-10-12 18:26:25,934 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 [2024-10-12 18:26:25,993 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 24 treesize of output 19 [2024-10-12 18:26:26,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 3 [2024-10-12 18:26:26,091 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 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 18:26:26,201 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 13 treesize of output 9 [2024-10-12 18:26:26,283 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-12 18:26:26,284 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 [2024-10-12 18:26:26,296 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 24 treesize of output 19 [2024-10-12 18:26:26,513 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 15 treesize of output 3 [2024-10-12 18:26:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-12 18:26:26,527 INFO L349 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2024-10-12 18:26:26,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 10 [2024-10-12 18:26:26,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 8 [2024-10-12 18:26:26,620 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 15 treesize of output 1 [2024-10-12 18:26:26,626 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 39 treesize of output 15 [2024-10-12 18:26:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:26:26,648 INFO L349 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2024-10-12 18:26:26,649 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 1 case distinctions, treesize of input 97 treesize of output 21 [2024-10-12 18:26:26,733 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 35 treesize of output 27 [2024-10-12 18:26:26,735 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 34 treesize of output 22 [2024-10-12 18:26:26,738 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 19 treesize of output 7 [2024-10-12 18:26:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:26:26,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:26:27,062 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 64 [2024-10-12 18:26:27,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:27,540 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 66 [2024-10-12 18:26:27,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:27,562 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 137 [2024-10-12 18:26:27,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-10-12 18:26:27,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:27,662 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 44 treesize of output 44 [2024-10-12 18:26:27,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2024-10-12 18:26:27,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:27,743 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 221 treesize of output 185 [2024-10-12 18:26:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359738597] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:27,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:26:27,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2024-10-12 18:26:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014092917] [2024-10-12 18:26:27,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:26:27,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-12 18:26:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:26:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-12 18:26:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1999, Unknown=42, NotChecked=0, Total=2162 [2024-10-12 18:26:27,994 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 40 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 18:26:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:26:29,616 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-10-12 18:26:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 18:26:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2024-10-12 18:26:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:26:29,620 INFO L225 Difference]: With dead ends: 49 [2024-10-12 18:26:29,620 INFO L226 Difference]: Without dead ends: 47 [2024-10-12 18:26:29,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=260, Invalid=3356, Unknown=44, NotChecked=0, Total=3660 [2024-10-12 18:26:29,624 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 18:26:29,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 380 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 18:26:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-12 18:26:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-10-12 18:26:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:26:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-10-12 18:26:29,643 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 28 [2024-10-12 18:26:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:26:29,643 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-10-12 18:26:29,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 18:26:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-10-12 18:26:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:26:29,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:26:29,648 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:26:29,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 18:26:29,852 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 [2024-10-12 18:26:29,853 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:26:29,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:26:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -372374486, now seen corresponding path program 1 times [2024-10-12 18:26:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:26:29,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464403991] [2024-10-12 18:26:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:26:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:31,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:26:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:31,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:26:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:31,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:26:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:26:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:26:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464403991] [2024-10-12 18:26:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464403991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76064799] [2024-10-12 18:26:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:31,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:26:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:26:31,860 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) [2024-10-12 18:26:31,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:26:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:32,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-10-12 18:26:32,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:26:32,085 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 [2024-10-12 18:26:32,342 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 [2024-10-12 18:26:32,426 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:26:32,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-12 18:26:32,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-12 18:26:32,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 18:26:32,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 18:26:32,653 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-10-12 18:26:32,653 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 65 [2024-10-12 18:26:32,662 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 36 treesize of output 15 [2024-10-12 18:26:32,671 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 36 treesize of output 15 [2024-10-12 18:26:32,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 14 [2024-10-12 18:26:32,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 7 [2024-10-12 18:26:32,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2024-10-12 18:26:32,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2024-10-12 18:26:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:26:33,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2024-10-12 18:26:33,058 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-10-12 18:26:33,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-10-12 18:26:33,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-12 18:26:33,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-12 18:26:33,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2024-10-12 18:26:33,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 15 [2024-10-12 18:26:34,020 INFO L349 Elim1Store]: treesize reduction 92, result has 22.7 percent of original size [2024-10-12 18:26:34,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 102 [2024-10-12 18:26:34,066 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-12 18:26:34,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 136 [2024-10-12 18:26:34,090 INFO L349 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2024-10-12 18:26:34,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 289 treesize of output 164 [2024-10-12 18:26:34,115 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-10-12 18:26:34,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 22 [2024-10-12 18:26:34,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-12 18:26:34,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 41 [2024-10-12 18:26:34,179 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-10-12 18:26:34,289 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 172 treesize of output 124 [2024-10-12 18:26:34,293 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 128 treesize of output 88 [2024-10-12 18:26:34,416 INFO L349 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2024-10-12 18:26:34,417 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 52 [2024-10-12 18:26:34,426 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 15 treesize of output 7 [2024-10-12 18:26:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:26:34,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:26:34,703 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1029 (Array Int Int)) (v_ArrVal_1026 (Array Int Int)) (|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1024 (Array Int Int)) (v_ArrVal_1030 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse0 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_1024) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_1029) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select .cse0 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_1026) .cse1) .cse2)) (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select .cse3 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_1030) .cse1) .cse2) 4)))))) is different from false [2024-10-12 18:26:35,445 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| Int) (v_ArrVal_1029 (Array Int Int)) (v_ArrVal_1026 (Array Int Int)) (|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1024 (Array Int Int)) (v_DerPreprocessor_6 Int) (v_ArrVal_1041 (Array Int Int)) (v_ArrVal_1030 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse8 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse4 (store (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25|) 0 0) 4 v_DerPreprocessor_6))) (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| .cse4)) (.cse2 (select .cse8 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse3 (select .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (let ((.cse1 (select (select .cse0 .cse2) .cse3))) (or (not (= (select (select .cse0 .cse1) (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| v_ArrVal_1041) .cse2) .cse3)) .cse2)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse8 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (store (store |c_#memory_int#1| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| v_ArrVal_1024) .cse1 v_ArrVal_1029) (select (select (store (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| (store .cse4 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse2)) .cse1 v_ArrVal_1026) .cse5) .cse6)) (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25| (store v_ArrVal_1041 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse3)) .cse1 v_ArrVal_1030) .cse5) .cse6) 4)))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_25|) 0))))))) is different from false [2024-10-12 18:26:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76064799] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:35,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:26:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 47 [2024-10-12 18:26:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371530522] [2024-10-12 18:26:35,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:26:35,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-12 18:26:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:26:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-12 18:26:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2792, Unknown=3, NotChecked=214, Total=3192 [2024-10-12 18:26:35,465 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 47 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:26:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:26:37,114 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-10-12 18:26:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 18:26:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2024-10-12 18:26:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:26:37,117 INFO L225 Difference]: With dead ends: 67 [2024-10-12 18:26:37,118 INFO L226 Difference]: Without dead ends: 65 [2024-10-12 18:26:37,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=333, Invalid=4784, Unknown=3, NotChecked=282, Total=5402 [2024-10-12 18:26:37,119 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 18:26:37,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 322 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 18:26:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-12 18:26:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2024-10-12 18:26:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:26:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-10-12 18:26:37,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 30 [2024-10-12 18:26:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:26:37,137 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-10-12 18:26:37,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:26:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-10-12 18:26:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:26:37,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:26:37,139 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:26:37,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 18:26:37,339 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 [2024-10-12 18:26:37,340 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:26:37,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:26:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1137364884, now seen corresponding path program 2 times [2024-10-12 18:26:37,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:26:37,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594301080] [2024-10-12 18:26:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:26:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:38,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:26:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:38,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:26:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:38,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:26:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:26:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:26:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594301080] [2024-10-12 18:26:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594301080] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528731683] [2024-10-12 18:26:38,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:26:38,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:26:38,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:26:38,656 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) [2024-10-12 18:26:38,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 18:26:38,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:26:38,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:26:38,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-10-12 18:26:38,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:26:38,830 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 [2024-10-12 18:26:39,003 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:26:39,003 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 [2024-10-12 18:26:39,044 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 [2024-10-12 18:26:39,054 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 [2024-10-12 18:26:39,118 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-10-12 18:26:39,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 50 [2024-10-12 18:26:39,124 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 39 treesize of output 30 [2024-10-12 18:26:39,191 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-12 18:26:39,191 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 64 treesize of output 31 [2024-10-12 18:26:39,199 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 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 18:26:39,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-10-12 18:26:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:26:39,346 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-10-12 18:26:39,347 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 82 treesize of output 56 [2024-10-12 18:26:39,371 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2024-10-12 18:26:39,371 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 53 [2024-10-12 18:26:39,400 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-10-12 18:26:39,400 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 28 treesize of output 30 [2024-10-12 18:26:39,815 INFO L349 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2024-10-12 18:26:39,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 42 [2024-10-12 18:26:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:26:39,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:26:40,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528731683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:40,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:26:40,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2024-10-12 18:26:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710875443] [2024-10-12 18:26:40,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:26:40,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 18:26:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:26:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 18:26:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 18:26:40,262 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 36 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 18:26:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:26:41,271 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-10-12 18:26:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 18:26:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2024-10-12 18:26:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:26:41,273 INFO L225 Difference]: With dead ends: 67 [2024-10-12 18:26:41,273 INFO L226 Difference]: Without dead ends: 56 [2024-10-12 18:26:41,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2024-10-12 18:26:41,274 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:26:41,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 255 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:26:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-12 18:26:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-10-12 18:26:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:26:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-10-12 18:26:41,285 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 30 [2024-10-12 18:26:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:26:41,286 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-10-12 18:26:41,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 18:26:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-10-12 18:26:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 18:26:41,287 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:26:41,287 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:26:41,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 18:26:41,487 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 [2024-10-12 18:26:41,488 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:26:41,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:26:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1367717310, now seen corresponding path program 1 times [2024-10-12 18:26:41,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:26:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271185968] [2024-10-12 18:26:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:26:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:43,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:26:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:43,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:26:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:43,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:26:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:26:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:26:43,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271185968] [2024-10-12 18:26:43,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271185968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:43,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984035717] [2024-10-12 18:26:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:26:43,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:26:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:26:43,200 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) [2024-10-12 18:26:43,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 18:26:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:26:43,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-10-12 18:26:43,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:26:43,437 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 [2024-10-12 18:26:43,680 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:26:43,680 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 [2024-10-12 18:26:43,718 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 [2024-10-12 18:26:43,777 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2024-10-12 18:26:43,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2024-10-12 18:26:43,829 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 38 treesize of output 14 [2024-10-12 18:26:43,833 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 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 18:26:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:26:43,933 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 46 treesize of output 35 [2024-10-12 18:26:43,950 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-12 18:26:43,950 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 32 treesize of output 34 [2024-10-12 18:26:44,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2024-10-12 18:26:44,331 INFO L349 Elim1Store]: treesize reduction 65, result has 9.7 percent of original size [2024-10-12 18:26:44,332 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 84 [2024-10-12 18:26:44,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 115 [2024-10-12 18:26:44,356 INFO L349 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2024-10-12 18:26:44,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 220 treesize of output 121 [2024-10-12 18:26:44,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-12 18:26:44,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 112 [2024-10-12 18:26:44,375 INFO L349 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2024-10-12 18:26:44,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 132 [2024-10-12 18:26:44,421 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 108 treesize of output 80 [2024-10-12 18:26:44,470 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 48 [2024-10-12 18:26:44,542 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 83 treesize of output 51 [2024-10-12 18:26:44,548 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-12 18:26:44,548 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 48 treesize of output 19 [2024-10-12 18:26:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:26:44,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:26:44,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:44,727 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 122 [2024-10-12 18:26:44,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:26:44,739 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 245 treesize of output 248 [2024-10-12 18:26:44,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 190 [2024-10-12 18:26:46,432 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse16 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|))) (let ((.cse0 (select .cse16 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset|))) (or (forall ((|v_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset_32| Int)) (not (= .cse0 (select (select |c_#memory_$Pointer$#1.base| .cse1) |v_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset_32|)))) (let ((.cse10 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse8 (= .cse10 .cse1)) (.cse3 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse16 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse6 (= .cse3 .cse1)) (.cse4 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse11 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) (.cse13 (not .cse8))) (and (or (forall ((|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int))) (not (= (select (let ((.cse2 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse2 (select (select .cse2 .cse3) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) .cse3))) .cse6) (or (not .cse6) (forall ((|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int)) (v_arrayElimCell_145 Int)) (not (= (select (let ((.cse7 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse7 (select (select .cse7 .cse3) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) v_arrayElimCell_145) .cse3)))) (or .cse8 (forall ((v_arrayElimCell_144 Int) (|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int))) (or (not (= (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse9 (select (select .cse9 .cse10) .cse11))) v_arrayElimCell_144) .cse10)) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)))) (or (and (or (forall ((|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int)) (v_arrayElimCell_145 Int)) (not (= .cse10 (select (let ((.cse12 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse12 (select (select .cse12 .cse10) .cse11))) v_arrayElimCell_145)))) .cse13) (or .cse8 (forall ((v_arrayElimCell_144 Int) (|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int))) (not (= (select (let ((.cse14 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse14 (select (select .cse14 .cse10) .cse11))) v_arrayElimCell_144) .cse10))))) (= |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| .cse3)) (or (forall ((|ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| Int) (v_ArrVal_1410 (Array Int Int)) (v_arrayElimCell_145 Int)) (or (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|) (not (= .cse10 (select (let ((.cse15 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store .cse5 |ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| .cse0)) .cse1 v_ArrVal_1410))) (select .cse15 (select (select .cse15 .cse10) .cse11))) v_arrayElimCell_145))))) .cse13)))))))) is different from false [2024-10-12 18:26:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984035717] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:26:57,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:26:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2024-10-12 18:26:57,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675593430] [2024-10-12 18:26:57,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:26:57,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-12 18:26:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:26:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-12 18:26:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2507, Unknown=92, NotChecked=102, Total=2862 [2024-10-12 18:26:57,701 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 44 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 18:27:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:27:01,076 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-10-12 18:27:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 18:27:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2024-10-12 18:27:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:27:01,078 INFO L225 Difference]: With dead ends: 80 [2024-10-12 18:27:01,078 INFO L226 Difference]: Without dead ends: 77 [2024-10-12 18:27:01,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=383, Invalid=5839, Unknown=102, NotChecked=156, Total=6480 [2024-10-12 18:27:01,080 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 18:27:01,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 400 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 18:27:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-12 18:27:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2024-10-12 18:27:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:27:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-10-12 18:27:01,092 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 32 [2024-10-12 18:27:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:27:01,093 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-10-12 18:27:01,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 18:27:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-10-12 18:27:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 18:27:01,094 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:27:01,094 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:27:01,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 18:27:01,295 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 [2024-10-12 18:27:01,295 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:27:01,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:27:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash 550477520, now seen corresponding path program 1 times [2024-10-12 18:27:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:27:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661663319] [2024-10-12 18:27:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:27:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:27:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:03,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:27:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:03,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:27:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:03,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:27:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:27:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:27:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661663319] [2024-10-12 18:27:03,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661663319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:27:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961716906] [2024-10-12 18:27:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:27:03,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:27:03,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:27:03,918 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) [2024-10-12 18:27:03,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 18:27:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:04,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-10-12 18:27:04,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:27:04,192 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 [2024-10-12 18:27:04,200 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 [2024-10-12 18:27:04,535 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:27:04,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-12 18:27:04,550 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 16 treesize of output 11 [2024-10-12 18:27:04,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 18:27:04,646 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 16 treesize of output 11 [2024-10-12 18:27:04,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 18:27:04,790 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-10-12 18:27:04,791 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 83 [2024-10-12 18:27:04,798 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 55 treesize of output 19 [2024-10-12 18:27:04,808 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 36 treesize of output 15 [2024-10-12 18:27:04,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 21 [2024-10-12 18:27:04,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 7 [2024-10-12 18:27:04,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2024-10-12 18:27:04,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-10-12 18:27:05,204 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-10-12 18:27:05,205 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 1 case distinctions, treesize of input 30 treesize of output 22 [2024-10-12 18:27:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:27:05,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2024-10-12 18:27:05,244 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-10-12 18:27:05,245 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 24 treesize of output 31 [2024-10-12 18:27:05,276 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-10-12 18:27:05,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-10-12 18:27:06,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:27:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:27:06,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2024-10-12 18:27:06,301 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-12 18:27:06,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 237 treesize of output 181 [2024-10-12 18:27:06,313 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-10-12 18:27:06,404 INFO L349 Elim1Store]: treesize reduction 147, result has 29.7 percent of original size [2024-10-12 18:27:06,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 258 treesize of output 146 [2024-10-12 18:27:06,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 23 [2024-10-12 18:27:06,446 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 0 case distinctions, treesize of input 75 treesize of output 65 [2024-10-12 18:27:06,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 33 [2024-10-12 18:27:06,469 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-10-12 18:27:06,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-10-12 18:27:06,598 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 109 treesize of output 73 [2024-10-12 18:27:06,790 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-12 18:27:06,790 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 74 treesize of output 37 [2024-10-12 18:27:06,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 18:27:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:27:06,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:27:07,102 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1617 Int) (v_ArrVal_1613 (Array Int Int)) (v_ArrVal_1618 (Array Int Int)) (v_ArrVal_1616 (Array Int Int))) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| v_ArrVal_1618))) (or (not (= v_ArrVal_1613 (store (select .cse0 |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| (select v_ArrVal_1613 |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset|)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse8 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse7 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|))) (let ((.cse4 (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_1616)) (.cse1 (let ((.cse9 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset| (select .cse8 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))))) (store .cse9 |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| (store (select .cse9 |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| v_ArrVal_1617)))) (.cse5 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse8 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse7 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse2 (select (select .cse1 .cse5) .cse6)) (.cse3 (select (select .cse4 .cse5) .cse6))) (select (select (store .cse0 |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_1613) (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4))))))))) is different from false [2024-10-12 18:27:08,452 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1617 Int) (|v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| Int) (v_ArrVal_1613 (Array Int Int)) (v_DerPreprocessor_9 Int) (v_DerPreprocessor_8 Int) (v_ArrVal_1618 (Array Int Int)) (v_ArrVal_1616 (Array Int Int))) (let ((.cse11 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse12 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse14 (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37|))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| (store (store .cse14 0 0) 4 v_DerPreprocessor_8))) (.cse15 (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37|)) (.cse4 (select .cse12 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) (.cse16 (select .cse11 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (let ((.cse0 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| v_ArrVal_1618)) (.cse2 (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| (store (store .cse15 0 0) 4 v_DerPreprocessor_9)) .cse4) .cse16)) (.cse1 (select (select .cse3 .cse4) .cse16))) (or (not (= (store (select .cse0 .cse1) .cse2 (select v_ArrVal_1613 .cse2)) v_ArrVal_1613)) (not (= (select (select .cse3 .cse1) .cse2) .cse4)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse8 (store (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| (store (store .cse15 4 v_DerPreprocessor_9) 0 .cse16)) .cse1 v_ArrVal_1616)) (.cse5 (let ((.cse13 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37| (store (store .cse14 4 v_DerPreprocessor_8) 0 .cse4)))) (store .cse13 .cse1 (store (select .cse13 .cse1) .cse2 v_ArrVal_1617)))) (.cse9 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse10 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base| (store .cse11 |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse6 (select (select .cse5 .cse9) .cse10)) (.cse7 (select (select .cse8 .cse9) .cse10))) (select (select (store .cse0 .cse1 v_ArrVal_1613) (select (select .cse5 .cse6) .cse7)) (+ (select (select .cse8 .cse6) .cse7) 4))))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_37|) 0))))))) is different from false [2024-10-12 18:27:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961716906] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:27:08,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:27:08,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 48 [2024-10-12 18:27:08,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858229873] [2024-10-12 18:27:08,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:27:08,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-12 18:27:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:27:08,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-12 18:27:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3025, Unknown=3, NotChecked=222, Total=3422 [2024-10-12 18:27:08,465 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 48 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:27:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:27:10,699 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-10-12 18:27:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 18:27:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2024-10-12 18:27:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:27:10,700 INFO L225 Difference]: With dead ends: 73 [2024-10-12 18:27:10,700 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 18:27:10,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=335, Invalid=5370, Unknown=3, NotChecked=298, Total=6006 [2024-10-12 18:27:10,702 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:27:10,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 249 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 18:27:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 18:27:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-10-12 18:27:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 18:27:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-10-12 18:27:10,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 33 [2024-10-12 18:27:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:27:10,715 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-10-12 18:27:10,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:27:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-10-12 18:27:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 18:27:10,716 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:27:10,717 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:27:10,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 18:27:10,920 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 [2024-10-12 18:27:10,921 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:27:10,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:27:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash 74986748, now seen corresponding path program 1 times [2024-10-12 18:27:10,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:27:10,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256176060] [2024-10-12 18:27:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:27:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:27:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:27:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:27:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 18:27:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-12 18:27:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 18:27:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:27:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256176060] [2024-10-12 18:27:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256176060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:27:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925014550] [2024-10-12 18:27:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:27:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:27:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:27:11,045 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) [2024-10-12 18:27:11,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 18:27:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:27:11,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 18:27:11,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:27:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 18:27:11,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:27:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925014550] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:27:11,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:27:11,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-12 18:27:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776808047] [2024-10-12 18:27:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:27:11,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 18:27:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:27:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 18:27:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:27:11,296 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:27:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:27:11,323 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-10-12 18:27:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 18:27:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-12 18:27:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:27:11,325 INFO L225 Difference]: With dead ends: 72 [2024-10-12 18:27:11,325 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 18:27:11,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:27:11,327 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:27:11,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:27:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 18:27:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-12 18:27:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2024-10-12 18:27:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-10-12 18:27:11,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 34 [2024-10-12 18:27:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:27:11,339 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-10-12 18:27:11,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:27:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-10-12 18:27:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 18:27:11,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:27:11,340 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-12 18:27:11,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0