./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:13:56,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:13:56,548 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-30 10:13:56,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:13:56,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:13:56,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:13:56,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:13:56,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:13:56,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:13:56,579 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:13:56,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:13:56,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:13:56,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:13:56,580 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:13:56,580 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:13:56,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-30 10:13:56,581 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:13:56,582 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:13:56,582 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:13:56,582 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:13:56,583 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:13:56,583 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:13:56,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:13:56,584 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2025-04-30 10:13:56,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:13:56,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:13:56,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:13:56,807 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:13:56,808 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:13:56,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2025-04-30 10:13:58,175 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e539dec/71abb1101f98497ebb9f53dcda5a15cf/FLAGbc3ca9b37 [2025-04-30 10:13:58,471 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:13:58,471 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2025-04-30 10:13:58,486 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e539dec/71abb1101f98497ebb9f53dcda5a15cf/FLAGbc3ca9b37 [2025-04-30 10:13:59,176 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e539dec/71abb1101f98497ebb9f53dcda5a15cf [2025-04-30 10:13:59,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:13:59,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:13:59,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:13:59,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:13:59,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:13:59,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b76aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59, skipping insertion in model container [2025-04-30 10:13:59,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:13:59,495 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2025-04-30 10:13:59,499 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:13:59,506 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:13:59,561 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2025-04-30 10:13:59,563 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:13:59,580 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:13:59,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59 WrapperNode [2025-04-30 10:13:59,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:13:59,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:13:59,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:13:59,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:13:59,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,619 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 112 [2025-04-30 10:13:59,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:13:59,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:13:59,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:13:59,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:13:59,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,641 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 9, 9]. 45 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 6 writes are split as follows [0, 1, 5]. [2025-04-30 10:13:59,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,647 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,657 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:13:59,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:13:59,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:13:59,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:13:59,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (1/1) ... [2025-04-30 10:13:59,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:13:59,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:13:59,693 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) [2025-04-30 10:13:59,696 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 [2025-04-30 10:13:59,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-30 10:13:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-30 10:13:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-30 10:13:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2025-04-30 10:13:59,719 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-30 10:13:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-04-30 10:13:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-30 10:13:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-30 10:13:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-04-30 10:13:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-04-30 10:13:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-30 10:13:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-30 10:13:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-30 10:13:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:13:59,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:13:59,806 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:13:59,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:13:59,910 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2025-04-30 10:13:59,910 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:13:59,916 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:13:59,917 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-04-30 10:13:59,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:13:59 BoogieIcfgContainer [2025-04-30 10:13:59,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:13:59,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:13:59,919 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:13:59,922 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:13:59,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:13:59" (1/3) ... [2025-04-30 10:13:59,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea7c081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:13:59, skipping insertion in model container [2025-04-30 10:13:59,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:13:59" (2/3) ... [2025-04-30 10:13:59,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea7c081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:13:59, skipping insertion in model container [2025-04-30 10:13:59,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:13:59" (3/3) ... [2025-04-30 10:13:59,925 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2025-04-30 10:13:59,935 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:13:59,936 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2c_remove_all_reverse.i that has 2 procedures, 31 locations, 42 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-30 10:13:59,979 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:13:59,987 INFO L340 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;@55e550a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:13:59,989 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-30 10:13:59,992 INFO L278 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 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) [2025-04-30 10:13:59,997 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-04-30 10:13:59,997 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:13:59,998 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:13:59,998 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:00,001 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1427832084, now seen corresponding path program 1 times [2025-04-30 10:14:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:00,010 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328364347] [2025-04-30 10:14:00,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:00,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-30 10:14:00,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-30 10:14:00,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:00,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:14:00,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:00,286 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328364347] [2025-04-30 10:14:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328364347] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:14:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:14:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:14:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021537455] [2025-04-30 10:14:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:14:00,291 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:14:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:00,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:14:00,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:14:00,305 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-04-30 10:14:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:00,331 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-04-30 10:14:00,332 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:14:00,333 INFO L79 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-04-30 10:14:00,333 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:00,337 INFO L225 Difference]: With dead ends: 52 [2025-04-30 10:14:00,337 INFO L226 Difference]: Without dead ends: 30 [2025-04-30 10:14:00,339 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:14:00,342 INFO L437 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:00,342 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 65 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:14:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-04-30 10:14:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-04-30 10:14:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2025-04-30 10:14:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2025-04-30 10:14:00,371 INFO L79 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2025-04-30 10:14:00,371 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:00,371 INFO L485 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2025-04-30 10:14:00,371 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-04-30 10:14:00,371 INFO L278 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2025-04-30 10:14:00,373 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-04-30 10:14:00,373 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:00,373 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:00,373 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-30 10:14:00,374 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:00,374 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -724840916, now seen corresponding path program 1 times [2025-04-30 10:14:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:00,375 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797418536] [2025-04-30 10:14:00,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:00,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:00,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-30 10:14:00,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-30 10:14:00,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:00,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-30 10:14:00,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:00,517 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797418536] [2025-04-30 10:14:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797418536] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:14:00,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:14:00,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:14:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142910798] [2025-04-30 10:14:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:14:00,518 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:14:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:00,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:14:00,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:14:00,518 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:00,544 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2025-04-30 10:14:00,544 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:14:00,544 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-04-30 10:14:00,544 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:00,545 INFO L225 Difference]: With dead ends: 42 [2025-04-30 10:14:00,545 INFO L226 Difference]: Without dead ends: 39 [2025-04-30 10:14:00,545 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:14:00,545 INFO L437 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:00,546 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:14:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-04-30 10:14:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2025-04-30 10:14:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2025-04-30 10:14:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2025-04-30 10:14:00,554 INFO L79 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2025-04-30 10:14:00,554 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:00,554 INFO L485 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2025-04-30 10:14:00,554 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:00,554 INFO L278 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2025-04-30 10:14:00,555 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-04-30 10:14:00,555 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:00,555 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:00,555 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-30 10:14:00,555 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:00,555 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1089441009, now seen corresponding path program 1 times [2025-04-30 10:14:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:00,556 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761516324] [2025-04-30 10:14:00,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:00,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:00,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-30 10:14:00,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-30 10:14:00,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:00,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-30 10:14:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:00,846 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761516324] [2025-04-30 10:14:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761516324] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:14:00,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:14:00,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-30 10:14:00,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505786599] [2025-04-30 10:14:00,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:14:00,846 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:14:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:00,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:14:00,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:14:00,847 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:00,905 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2025-04-30 10:14:00,905 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:14:00,905 INFO L79 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2025-04-30 10:14:00,906 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:00,907 INFO L225 Difference]: With dead ends: 43 [2025-04-30 10:14:00,907 INFO L226 Difference]: Without dead ends: 29 [2025-04-30 10:14:00,907 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:14:00,908 INFO L437 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:00,909 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 102 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:14:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-04-30 10:14:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-04-30 10:14:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2025-04-30 10:14:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-04-30 10:14:00,915 INFO L79 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 28 [2025-04-30 10:14:00,915 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:00,915 INFO L485 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-04-30 10:14:00,915 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:00,916 INFO L278 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-04-30 10:14:00,916 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-04-30 10:14:00,917 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:00,917 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:00,917 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-30 10:14:00,917 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:00,917 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1775796587, now seen corresponding path program 1 times [2025-04-30 10:14:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:00,918 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949643696] [2025-04-30 10:14:00,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:00,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-30 10:14:00,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-30 10:14:00,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:00,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-30 10:14:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:01,011 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949643696] [2025-04-30 10:14:01,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949643696] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:14:01,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:14:01,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:14:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750003313] [2025-04-30 10:14:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:14:01,012 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:14:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:01,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:14:01,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:14:01,013 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:01,046 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2025-04-30 10:14:01,047 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:14:01,047 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-04-30 10:14:01,047 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:01,047 INFO L225 Difference]: With dead ends: 48 [2025-04-30 10:14:01,047 INFO L226 Difference]: Without dead ends: 32 [2025-04-30 10:14:01,048 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:14:01,048 INFO L437 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:01,048 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:14:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-04-30 10:14:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2025-04-30 10:14:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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) [2025-04-30 10:14:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2025-04-30 10:14:01,053 INFO L79 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 31 [2025-04-30 10:14:01,053 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:01,053 INFO L485 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2025-04-30 10:14:01,053 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-04-30 10:14:01,053 INFO L278 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2025-04-30 10:14:01,054 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-04-30 10:14:01,054 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:01,054 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:01,054 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-30 10:14:01,054 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:01,054 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash -729806509, now seen corresponding path program 1 times [2025-04-30 10:14:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:01,056 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653601928] [2025-04-30 10:14:01,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:01,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-04-30 10:14:01,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-04-30 10:14:01,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:01,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-30 10:14:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:01,238 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653601928] [2025-04-30 10:14:01,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653601928] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:14:01,238 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542782841] [2025-04-30 10:14:01,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:14:01,241 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) [2025-04-30 10:14:01,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:14:01,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-04-30 10:14:01,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-04-30 10:14:01,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:01,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:01,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-30 10:14:01,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:14:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-04-30 10:14:01,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:14:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-04-30 10:14:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542782841] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:14:01,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:14:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2025-04-30 10:14:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070475624] [2025-04-30 10:14:01,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:14:01,558 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-30 10:14:01,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:01,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-30 10:14:01,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-04-30 10:14:01,559 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-04-30 10:14:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:01,607 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2025-04-30 10:14:01,608 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:14:01,608 INFO L79 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2025-04-30 10:14:01,608 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:01,608 INFO L225 Difference]: With dead ends: 61 [2025-04-30 10:14:01,608 INFO L226 Difference]: Without dead ends: 58 [2025-04-30 10:14:01,609 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2025-04-30 10:14:01,609 INFO L437 NwaCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:01,609 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:14:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-04-30 10:14:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2025-04-30 10:14:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2025-04-30 10:14:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2025-04-30 10:14:01,619 INFO L79 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 34 [2025-04-30 10:14:01,619 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:01,619 INFO L485 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2025-04-30 10:14:01,619 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-04-30 10:14:01,619 INFO L278 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2025-04-30 10:14:01,620 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-04-30 10:14:01,620 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:01,620 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:01,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:14:01,821 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:01,821 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:01,821 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1856619002, now seen corresponding path program 2 times [2025-04-30 10:14:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:01,822 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069500854] [2025-04-30 10:14:01,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:14:01,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:01,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-04-30 10:14:01,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-04-30 10:14:01,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:14:01,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-04-30 10:14:02,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:02,270 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069500854] [2025-04-30 10:14:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069500854] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:14:02,270 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757617470] [2025-04-30 10:14:02,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:14:02,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:14:02,273 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) [2025-04-30 10:14:02,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:14:02,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-04-30 10:14:02,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-04-30 10:14:02,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:14:02,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:02,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 117 conjuncts are in the unsatisfiable core [2025-04-30 10:14:02,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:14:02,572 INFO L354 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 [2025-04-30 10:14:02,697 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2025-04-30 10:14:02,759 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:14:02,759 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:14:02,801 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-04-30 10:14:02,844 INFO L354 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 16 treesize of output 11 [2025-04-30 10:14:03,191 INFO L354 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 23 treesize of output 15 [2025-04-30 10:14:03,197 INFO L354 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 31 treesize of output 15 [2025-04-30 10:14:03,329 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:14:03,332 INFO L325 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2025-04-30 10:14:03,333 INFO L354 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 27 treesize of output 10 [2025-04-30 10:14:03,339 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-30 10:14:03,342 INFO L325 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2025-04-30 10:14:03,343 INFO L354 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 31 treesize of output 14 [2025-04-30 10:14:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:14:03,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:14:03,563 INFO L354 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 64 treesize of output 52 [2025-04-30 10:14:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-30 10:14:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757617470] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:14:03,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:14:03,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 22, 10] total 33 [2025-04-30 10:14:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690988553] [2025-04-30 10:14:03,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:14:03,781 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-30 10:14:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:03,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-30 10:14:03,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2025-04-30 10:14:03,782 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 33 states, 32 states have (on average 2.78125) internal successors, (89), 30 states have internal predecessors, (89), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-04-30 10:14:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:04,360 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2025-04-30 10:14:04,360 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-30 10:14:04,360 INFO L79 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 30 states have internal predecessors, (89), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2025-04-30 10:14:04,361 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:04,365 INFO L225 Difference]: With dead ends: 124 [2025-04-30 10:14:04,365 INFO L226 Difference]: Without dead ends: 98 [2025-04-30 10:14:04,366 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1616, Unknown=0, NotChecked=0, Total=1892 [2025-04-30 10:14:04,366 INFO L437 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:04,366 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 236 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-04-30 10:14:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-04-30 10:14:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 51. [2025-04-30 10:14:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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) [2025-04-30 10:14:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2025-04-30 10:14:04,379 INFO L79 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 46 [2025-04-30 10:14:04,380 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:04,380 INFO L485 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2025-04-30 10:14:04,381 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 30 states have internal predecessors, (89), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-04-30 10:14:04,381 INFO L278 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2025-04-30 10:14:04,381 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-04-30 10:14:04,381 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:04,382 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:04,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-30 10:14:04,582 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-30 10:14:04,582 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:04,583 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash -506823150, now seen corresponding path program 1 times [2025-04-30 10:14:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:04,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799597727] [2025-04-30 10:14:04,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:04,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-04-30 10:14:04,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-04-30 10:14:04,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:04,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-04-30 10:14:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:04,737 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799597727] [2025-04-30 10:14:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799597727] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:14:04,737 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145848402] [2025-04-30 10:14:04,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:14:04,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:14:04,739 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) [2025-04-30 10:14:04,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:14:04,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-04-30 10:14:05,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-04-30 10:14:05,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:14:05,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:05,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-30 10:14:05,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:14:05,159 INFO L354 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 26 [2025-04-30 10:14:05,187 INFO L325 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2025-04-30 10:14:05,188 INFO L354 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 34 treesize of output 14 [2025-04-30 10:14:05,195 INFO L354 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 23 treesize of output 7 [2025-04-30 10:14:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-04-30 10:14:05,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:14:05,304 INFO L325 Elim1Store]: treesize reduction 4, result has 93.1 percent of original size [2025-04-30 10:14:05,304 INFO L354 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 60 treesize of output 89 [2025-04-30 10:14:05,317 INFO L325 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2025-04-30 10:14:05,318 INFO L354 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 70 treesize of output 46 [2025-04-30 10:14:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-04-30 10:14:05,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145848402] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:14:05,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:14:05,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 15 [2025-04-30 10:14:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734201641] [2025-04-30 10:14:05,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:14:05,344 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-30 10:14:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:14:05,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-30 10:14:05,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-04-30 10:14:05,345 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-04-30 10:14:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:14:05,529 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2025-04-30 10:14:05,529 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-30 10:14:05,529 INFO L79 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2025-04-30 10:14:05,530 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:14:05,530 INFO L225 Difference]: With dead ends: 94 [2025-04-30 10:14:05,530 INFO L226 Difference]: Without dead ends: 63 [2025-04-30 10:14:05,530 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2025-04-30 10:14:05,531 INFO L437 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-30 10:14:05,531 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 123 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-30 10:14:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-04-30 10:14:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2025-04-30 10:14:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 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) [2025-04-30 10:14:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2025-04-30 10:14:05,536 INFO L79 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 49 [2025-04-30 10:14:05,537 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:14:05,537 INFO L485 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2025-04-30 10:14:05,537 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-04-30 10:14:05,537 INFO L278 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2025-04-30 10:14:05,537 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-04-30 10:14:05,537 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:14:05,537 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:14:05,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-30 10:14:05,738 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:05,738 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-30 10:14:05,738 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:14:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -861479942, now seen corresponding path program 2 times [2025-04-30 10:14:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:14:05,738 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17899456] [2025-04-30 10:14:05,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:14:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:14:05,752 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-04-30 10:14:05,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-04-30 10:14:05,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:14:05,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-30 10:14:06,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:14:06,711 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17899456] [2025-04-30 10:14:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17899456] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:14:06,711 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307833875] [2025-04-30 10:14:06,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:14:06,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:14:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:14:06,715 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) [2025-04-30 10:14:06,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:14:06,796 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-04-30 10:14:06,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-04-30 10:14:06,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:14:06,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:14:06,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 118 conjuncts are in the unsatisfiable core [2025-04-30 10:14:06,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:14:06,996 INFO L354 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 [2025-04-30 10:14:07,149 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2025-04-30 10:14:07,189 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-30 10:14:07,189 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-04-30 10:14:07,247 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-04-30 10:14:07,256 INFO L354 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 [2025-04-30 10:14:07,298 INFO L325 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2025-04-30 10:14:07,298 INFO L354 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 47 treesize of output 33 [2025-04-30 10:14:07,301 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2025-04-30 10:14:08,343 INFO L325 Elim1Store]: treesize reduction 12, result has 85.2 percent of original size [2025-04-30 10:14:08,344 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 136 [2025-04-30 10:14:08,404 INFO L325 Elim1Store]: treesize reduction 28, result has 76.9 percent of original size [2025-04-30 10:14:08,405 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 65 treesize of output 129 [2025-04-30 10:14:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-30 10:14:09,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:14:10,023 INFO L354 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 266 treesize of output 210 [2025-04-30 10:14:10,026 INFO L354 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 214 treesize of output 150 [2025-04-30 10:14:10,492 INFO L325 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2025-04-30 10:14:10,493 INFO L354 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 2952 treesize of output 2571 [2025-04-30 10:14:13,489 INFO L325 Elim1Store]: treesize reduction 121, result has 30.1 percent of original size [2025-04-30 10:14:13,489 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1811 treesize of output 1750 Killed by 15