./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:10:19,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:10:19,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:10:19,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:10:19,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:10:19,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:10:19,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:10:19,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:10:19,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:10:19,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:10:19,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:10:19,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:10:19,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:10:19,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:10:19,826 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:10:19,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:10:19,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:10:19,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:10:19,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:10:19,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:10:19,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:10:19,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:10:19,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:10:19,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:10:19,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:10:19,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:10:19,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:10:19,831 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:10:19,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:10:19,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:10:19,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:10:19,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:10:19,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:10:19,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:10:19,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:10:19,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:10:19,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:10:19,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:10:19,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:10:19,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:10:19,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:10:19,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:10:19,836 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2024-11-18 13:10:20,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:10:20,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:10:20,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:10:20,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:10:20,104 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:10:20,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-18 13:10:21,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:10:21,742 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:10:21,742 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-18 13:10:21,754 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66c5a22de/78b57c0b0f094609928df4a93f6af75f/FLAG8a837b062 [2024-11-18 13:10:22,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66c5a22de/78b57c0b0f094609928df4a93f6af75f [2024-11-18 13:10:22,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:10:22,111 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:10:22,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:10:22,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:10:22,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:10:22,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc00685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22, skipping insertion in model container [2024-11-18 13:10:22,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,164 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:10:22,462 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2024-11-18 13:10:22,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:10:22,478 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:10:22,544 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2024-11-18 13:10:22,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:10:22,579 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:10:22,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22 WrapperNode [2024-11-18 13:10:22,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:10:22,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:10:22,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:10:22,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:10:22,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,636 INFO L138 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2024-11-18 13:10:22,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:10:22,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:10:22,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:10:22,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:10:22,649 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,676 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 12, 6]. 60 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-18 13:10:22,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,684 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:10:22,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:10:22,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:10:22,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:10:22,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (1/1) ... [2024-11-18 13:10:22,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:10:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:22,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 13:10:22,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 13:10:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 13:10:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 13:10:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 13:10:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 13:10:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 13:10:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 13:10:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-18 13:10:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-18 13:10:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-18 13:10:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-18 13:10:22,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:10:22,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 13:10:22,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 13:10:22,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:10:22,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:10:22,895 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:10:22,896 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:10:23,118 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-18 13:10:23,118 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:10:23,139 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:10:23,139 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-18 13:10:23,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:10:23 BoogieIcfgContainer [2024-11-18 13:10:23,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:10:23,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:10:23,142 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:10:23,145 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:10:23,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:10:22" (1/3) ... [2024-11-18 13:10:23,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae2bbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:10:23, skipping insertion in model container [2024-11-18 13:10:23,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:22" (2/3) ... [2024-11-18 13:10:23,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae2bbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:10:23, skipping insertion in model container [2024-11-18 13:10:23,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:10:23" (3/3) ... [2024-11-18 13:10:23,148 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2024-11-18 13:10:23,164 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:10:23,164 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:10:23,212 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:10:23,218 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ccd8b50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:10:23,219 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:10:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:10:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 13:10:23,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:23,237 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:23,237 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:23,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1473722618, now seen corresponding path program 1 times [2024-11-18 13:10:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:23,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413370796] [2024-11-18 13:10:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413370796] [2024-11-18 13:10:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413370796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:10:23,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:10:23,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 13:10:23,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912005213] [2024-11-18 13:10:23,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:10:23,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:10:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:10:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:10:23,579 INFO L87 Difference]: Start difference. First operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 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 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:10:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:23,599 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2024-11-18 13:10:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:10:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 17 [2024-11-18 13:10:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:23,608 INFO L225 Difference]: With dead ends: 64 [2024-11-18 13:10:23,608 INFO L226 Difference]: Without dead ends: 29 [2024-11-18 13:10:23,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:10:23,614 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:23,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:10:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-18 13:10:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-18 13:10:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:10:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-18 13:10:23,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2024-11-18 13:10:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:23,655 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-18 13:10:23,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:10:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-18 13:10:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 13:10:23,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:23,658 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:23,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:10:23,658 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:23,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1996757262, now seen corresponding path program 1 times [2024-11-18 13:10:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970370928] [2024-11-18 13:10:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:23,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970370928] [2024-11-18 13:10:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970370928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:10:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:10:23,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:10:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401222347] [2024-11-18 13:10:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:10:23,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:10:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:10:23,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:10:23,851 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:10:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:23,870 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-11-18 13:10:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:10:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2024-11-18 13:10:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:23,872 INFO L225 Difference]: With dead ends: 56 [2024-11-18 13:10:23,872 INFO L226 Difference]: Without dead ends: 33 [2024-11-18 13:10:23,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:10:23,876 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 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 [2024-11-18 13:10:23,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 65 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:10:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-18 13:10:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-18 13:10:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:10:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-18 13:10:23,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2024-11-18 13:10:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:23,887 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-18 13:10:23,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:10:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-18 13:10:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-18 13:10:23,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:23,890 INFO L215 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] [2024-11-18 13:10:23,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:10:23,890 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:23,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1017886446, now seen corresponding path program 1 times [2024-11-18 13:10:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:23,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093146556] [2024-11-18 13:10:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 13:10:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:24,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093146556] [2024-11-18 13:10:24,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093146556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963865875] [2024-11-18 13:10:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:24,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:10:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:24,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 13:10:24,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:24,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 13:10:24,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963865875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:10:24,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:10:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-18 13:10:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130653730] [2024-11-18 13:10:24,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:24,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:10:24,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:10:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:10:24,404 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 13:10:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:24,425 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-11-18 13:10:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 13:10:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-11-18 13:10:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:24,427 INFO L225 Difference]: With dead ends: 57 [2024-11-18 13:10:24,427 INFO L226 Difference]: Without dead ends: 34 [2024-11-18 13:10:24,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:10:24,429 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:24,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 93 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:10:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-18 13:10:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-18 13:10:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-18 13:10:24,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 26 [2024-11-18 13:10:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:24,435 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-18 13:10:24,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 13:10:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-18 13:10:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 13:10:24,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:24,436 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:24,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:10:24,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:24,637 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:24,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1383615218, now seen corresponding path program 2 times [2024-11-18 13:10:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:24,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644543349] [2024-11-18 13:10:24,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:10:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:24,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:10:24,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:10:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 13:10:25,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644543349] [2024-11-18 13:10:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644543349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936604317] [2024-11-18 13:10:25,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:10:25,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:25,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:25,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:10:25,205 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:10:25,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:10:25,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-18 13:10:25,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:25,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 13:10:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 13:10:25,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 13:10:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936604317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:10:25,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:10:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 12 [2024-11-18 13:10:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795858559] [2024-11-18 13:10:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:25,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 13:10:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 13:10:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:10:25,405 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 13:10:29,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 13:10:33,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 13:10:37,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 13:10:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:37,577 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-18 13:10:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 13:10:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-18 13:10:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:37,579 INFO L225 Difference]: With dead ends: 49 [2024-11-18 13:10:37,579 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 13:10:37,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-18 13:10:37,581 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:37,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 252 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-11-18 13:10:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 13:10:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-18 13:10:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-18 13:10:37,593 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 35 [2024-11-18 13:10:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:37,594 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-18 13:10:37,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 13:10:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-18 13:10:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-18 13:10:37,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:37,596 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:37,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:10:37,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 13:10:37,800 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:37,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1699814766, now seen corresponding path program 1 times [2024-11-18 13:10:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:37,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398715285] [2024-11-18 13:10:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:10:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398715285] [2024-11-18 13:10:38,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398715285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:38,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118024395] [2024-11-18 13:10:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:38,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:38,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:38,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:10:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:38,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-18 13:10:38,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:39,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-18 13:10:39,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 13:10:39,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-18 13:10:39,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-18 13:10:39,271 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_1|) 0)) (exists ((|v_node_create_~temp~0#1.base_25| Int)) (and (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_25| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_25|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_25|) 0)))) is different from true [2024-11-18 13:10:39,306 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-18 13:10:39,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-18 13:10:39,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-18 13:10:39,603 INFO L349 Elim1Store]: treesize reduction 57, result has 33.7 percent of original size [2024-11-18 13:10:39,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 36 [2024-11-18 13:10:39,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2024-11-18 13:10:39,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-18 13:10:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-18 13:10:39,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118024395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:40,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:10:40,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 27 [2024-11-18 13:10:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730586845] [2024-11-18 13:10:40,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:40,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 13:10:40,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 13:10:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=881, Unknown=2, NotChecked=60, Total=1056 [2024-11-18 13:10:40,110 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:10:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:40,737 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-18 13:10:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 13:10:40,738 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2024-11-18 13:10:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:40,740 INFO L225 Difference]: With dead ends: 53 [2024-11-18 13:10:40,741 INFO L226 Difference]: Without dead ends: 42 [2024-11-18 13:10:40,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=1395, Unknown=2, NotChecked=76, Total=1640 [2024-11-18 13:10:40,742 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:40,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 453 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 408 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2024-11-18 13:10:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-18 13:10:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-18 13:10:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-18 13:10:40,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2024-11-18 13:10:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:40,751 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-18 13:10:40,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:10:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-18 13:10:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 13:10:40,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:40,754 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:40,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 13:10:40,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:40,955 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:40,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash 968809289, now seen corresponding path program 1 times [2024-11-18 13:10:40,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538227467] [2024-11-18 13:10:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:42,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:42,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538227467] [2024-11-18 13:10:42,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538227467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:42,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363560707] [2024-11-18 13:10:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:42,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:42,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:42,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:10:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:42,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-18 13:10:42,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:42,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-18 13:10:42,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-18 13:10:42,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 4 [2024-11-18 13:10:42,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-18 13:10:42,950 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_34| Int)) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_34| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_34|)) |c_#memory_$Pointer$#1.base|) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_34|) 0))) is different from true [2024-11-18 13:10:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:10:42,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-18 13:10:42,969 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-18 13:10:42,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-18 13:10:43,125 INFO L349 Elim1Store]: treesize reduction 59, result has 37.2 percent of original size [2024-11-18 13:10:43,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 42 [2024-11-18 13:10:43,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-11-18 13:10:43,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2024-11-18 13:10:43,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-18 13:10:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2024-11-18 13:10:43,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363560707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:43,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:10:43,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2024-11-18 13:10:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895703999] [2024-11-18 13:10:43,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:43,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 13:10:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 13:10:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1453, Unknown=2, NotChecked=76, Total=1640 [2024-11-18 13:10:43,423 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 13:10:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:44,312 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-18 13:10:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-18 13:10:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-11-18 13:10:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:44,313 INFO L225 Difference]: With dead ends: 48 [2024-11-18 13:10:44,313 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 13:10:44,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=217, Invalid=2865, Unknown=2, NotChecked=108, Total=3192 [2024-11-18 13:10:44,315 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:44,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 524 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 777 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2024-11-18 13:10:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 13:10:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-18 13:10:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-18 13:10:44,326 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 40 [2024-11-18 13:10:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:44,326 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-18 13:10:44,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 13:10:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-18 13:10:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-18 13:10:44,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:44,327 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:44,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 13:10:44,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:44,534 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:44,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1006966459, now seen corresponding path program 1 times [2024-11-18 13:10:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:44,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65417039] [2024-11-18 13:10:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:10:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65417039] [2024-11-18 13:10:45,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65417039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211905940] [2024-11-18 13:10:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:45,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:45,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 13:10:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:45,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-18 13:10:45,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:46,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-18 13:10:46,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:10:46,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-18 13:10:46,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:10:46,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-18 13:10:46,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-18 13:10:46,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-18 13:10:46,505 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_42| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_42| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_42|))) (= 0 (select |c_old(#valid)| |v_node_create_~temp~0#1.base_42|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_42| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_42|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_3| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_3|) 0) 0))) is different from true [2024-11-18 13:10:46,543 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-18 13:10:46,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-18 13:10:46,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-18 13:10:46,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-18 13:10:46,834 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-18 13:10:46,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-18 13:10:46,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-18 13:10:46,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 13:10:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-18 13:10:46,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:48,388 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_589 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.base_23| Int) (|v_node_create_~temp~0#1.base_47| Int) (v_ArrVal_597 (Array Int Int)) (v_ArrVal_596 (Array Int Int))) (let ((.cse0 (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_47| v_ArrVal_597))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store .cse0 |v_ULTIMATE.start_sll_append_~last~0#1.base_23| v_ArrVal_589) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= v_ArrVal_589 (let ((.cse1 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_47| v_ArrVal_596) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)) 4))) (store (select .cse0 |v_ULTIMATE.start_sll_append_~last~0#1.base_23|) .cse1 (select v_ArrVal_589 .cse1))))) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_47|) 0))))) is different from false [2024-11-18 13:10:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211905940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:48,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:10:48,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2024-11-18 13:10:48,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614425758] [2024-11-18 13:10:48,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:48,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-18 13:10:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-18 13:10:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1470, Unknown=36, NotChecked=158, Total=1806 [2024-11-18 13:10:48,396 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 39 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:10:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:49,119 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-18 13:10:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 13:10:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-11-18 13:10:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:49,121 INFO L225 Difference]: With dead ends: 60 [2024-11-18 13:10:49,121 INFO L226 Difference]: Without dead ends: 58 [2024-11-18 13:10:49,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=214, Invalid=2305, Unknown=39, NotChecked=198, Total=2756 [2024-11-18 13:10:49,123 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:49,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 300 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 484 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2024-11-18 13:10:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-18 13:10:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2024-11-18 13:10:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-18 13:10:49,133 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 42 [2024-11-18 13:10:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:49,133 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-18 13:10:49,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:10:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-18 13:10:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-18 13:10:49,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:49,135 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:49,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 13:10:49,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:49,336 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:49,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1151243655, now seen corresponding path program 1 times [2024-11-18 13:10:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572097302] [2024-11-18 13:10:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-18 13:10:49,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:49,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572097302] [2024-11-18 13:10:49,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572097302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:10:49,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:10:49,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:10:49,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438344646] [2024-11-18 13:10:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:10:49,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:10:49,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:10:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:10:49,445 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2024-11-18 13:10:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:49,494 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-11-18 13:10:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:10:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2024-11-18 13:10:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:49,497 INFO L225 Difference]: With dead ends: 56 [2024-11-18 13:10:49,497 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 13:10:49,497 INFO L431 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 [2024-11-18 13:10:49,498 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:49,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:10:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 13:10:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-18 13:10:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-18 13:10:49,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 43 [2024-11-18 13:10:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:49,510 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-18 13:10:49,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2024-11-18 13:10:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-18 13:10:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 13:10:49,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:49,512 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:49,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 13:10:49,513 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:49,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash 223363488, now seen corresponding path program 2 times [2024-11-18 13:10:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:49,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986826023] [2024-11-18 13:10:49,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:10:49,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:49,563 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:10:49,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:10:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:51,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986826023] [2024-11-18 13:10:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986826023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563326190] [2024-11-18 13:10:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:10:51,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:51,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:51,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 13:10:51,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:10:51,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:10:51,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-18 13:10:51,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:51,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-18 13:10:51,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:10:52,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:10:52,259 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-18 13:10:52,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-18 13:10:52,285 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-18 13:10:52,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-18 13:10:52,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 13:10:52,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-18 13:10:52,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-18 13:10:52,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2024-11-18 13:10:52,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-18 13:10:52,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 13:10:52,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-18 13:10:52,822 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4|) 0) 0)) (exists ((|v_node_create_~temp~0#1.base_51| Int)) (and (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_51| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_51|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|) 0) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_51| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_51|))) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_51| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_51|)))))) is different from true [2024-11-18 13:10:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:10:52,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2024-11-18 13:10:52,886 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-18 13:10:52,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-18 13:10:52,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-18 13:10:52,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-18 13:10:53,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2024-11-18 13:10:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:10:53,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-18 13:10:53,799 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-18 13:10:53,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 35 [2024-11-18 13:10:53,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-18 13:10:53,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 13:10:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-18 13:10:53,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:10:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563326190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:55,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:10:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2024-11-18 13:10:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130624701] [2024-11-18 13:10:55,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:10:55,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-18 13:10:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:10:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-18 13:10:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3186, Unknown=12, NotChecked=114, Total=3540 [2024-11-18 13:10:55,291 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 50 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:10:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:10:57,611 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-11-18 13:10:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-18 13:10:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-18 13:10:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:10:57,612 INFO L225 Difference]: With dead ends: 88 [2024-11-18 13:10:57,612 INFO L226 Difference]: Without dead ends: 86 [2024-11-18 13:10:57,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=513, Invalid=6961, Unknown=12, NotChecked=170, Total=7656 [2024-11-18 13:10:57,614 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 13:10:57,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 444 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 856 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2024-11-18 13:10:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-18 13:10:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2024-11-18 13:10:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:10:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-18 13:10:57,637 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2024-11-18 13:10:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:10:57,637 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-18 13:10:57,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:10:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-18 13:10:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 13:10:57,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:10:57,638 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:10:57,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 13:10:57,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:57,839 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:10:57,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:10:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1809434049, now seen corresponding path program 1 times [2024-11-18 13:10:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:10:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069893353] [2024-11-18 13:10:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:10:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:10:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:10:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069893353] [2024-11-18 13:10:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069893353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:10:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462745547] [2024-11-18 13:10:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:10:59,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:10:59,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:10:59,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:10:59,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 13:10:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:10:59,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-18 13:10:59,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:10:59,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-18 13:10:59,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:11:00,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-18 13:11:00,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:11:00,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:11:00,360 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-18 13:11:00,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-18 13:11:00,380 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-18 13:11:00,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-18 13:11:00,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-18 13:11:00,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-18 13:11:00,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-18 13:11:00,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-18 13:11:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:11:00,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-18 13:11:00,720 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-18 13:11:00,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 38 [2024-11-18 13:11:00,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 13:11:00,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-18 13:11:00,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-18 13:11:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:11:01,582 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-18 13:11:01,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 56 [2024-11-18 13:11:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:11:01,611 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-18 13:11:01,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-18 13:11:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:11:01,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-18 13:11:01,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-18 13:11:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 13:11:02,432 INFO L349 Elim1Store]: treesize reduction 200, result has 15.3 percent of original size [2024-11-18 13:11:02,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 138 treesize of output 104 [2024-11-18 13:11:02,463 INFO L349 Elim1Store]: treesize reduction 53, result has 42.4 percent of original size [2024-11-18 13:11:02,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2024-11-18 13:11:02,510 INFO L349 Elim1Store]: treesize reduction 127, result has 29.1 percent of original size [2024-11-18 13:11:02,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 95 [2024-11-18 13:11:05,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 155 [2024-11-18 13:11:06,349 INFO L349 Elim1Store]: treesize reduction 8, result has 96.4 percent of original size [2024-11-18 13:11:06,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 294 treesize of output 423 [2024-11-18 13:11:08,777 INFO L349 Elim1Store]: treesize reduction 104, result has 91.4 percent of original size [2024-11-18 13:11:08,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 18 new quantified variables, introduced 119 case distinctions, treesize of input 202 treesize of output 1238