./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:43:33,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:43:33,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:43:33,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:43:33,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:43:33,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:43:33,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:43:33,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:43:33,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:43:33,660 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:43:33,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:43:33,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:43:33,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:43:33,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:43:33,661 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:43:33,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:43:33,663 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:43:33,664 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:43:33,664 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:43:33,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:43:33,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:43:33,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:43:33,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:43:33,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:43:33,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:43:33,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:43:33,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:43:33,669 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:43:33,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:43:33,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:43:33,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:43:33,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:43:33,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:43:33,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:43:33,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:43:33,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:43:33,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:43:33,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:43:33,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:43:33,672 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:43:33,672 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:43:33,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:43:33,673 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:43:33,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:43:33,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:43:33,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:43:33,944 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:43:33,945 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:43:33,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2024-09-18 16:43:35,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:43:35,570 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:43:35,570 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2024-09-18 16:43:35,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9d7d393e1/3db3d673dfe24f0fa86b07bd14b8d3d2/FLAGec453d6b1 [2024-09-18 16:43:35,598 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9d7d393e1/3db3d673dfe24f0fa86b07bd14b8d3d2 [2024-09-18 16:43:35,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:43:35,602 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:43:35,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:43:35,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:43:35,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:43:35,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a74fc0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35, skipping insertion in model container [2024-09-18 16:43:35,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,634 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:43:35,788 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2024-09-18 16:43:35,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:43:35,855 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:43:35,868 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2024-09-18 16:43:35,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:43:35,929 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:43:35,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35 WrapperNode [2024-09-18 16:43:35,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:43:35,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:43:35,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:43:35,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:43:35,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,954 INFO L138 Inliner]: procedures = 20, calls = 62, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:43:35,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:43:35,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:43:35,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:43:35,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:43:35,964 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,994 INFO L175 MemorySlicer]: Split 37 memory accesses to 6 slices as follows [2, 5, 5, 11, 11, 3]. 30 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 1, 0, 0, 1]. The 9 writes are split as follows [0, 1, 1, 3, 3, 1]. [2024-09-18 16:43:35,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:35,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:43:36,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:43:36,020 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:43:36,020 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:43:36,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (1/1) ... [2024-09-18 16:43:36,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:43:36,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:43:36,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:43:36,054 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 16:43:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_41_0 [2024-09-18 16:43:36,099 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_41_0 [2024-09-18 16:43:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:43:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_49_to_54_0 [2024-09-18 16:43:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_49_to_54_0 [2024-09-18 16:43:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:43:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:43:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:43:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:43:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-18 16:43:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:43:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:43:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:43:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:43:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:43:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:43:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-18 16:43:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:43:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:43:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_58_to_61_0 [2024-09-18 16:43:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_58_to_61_0 [2024-09-18 16:43:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:43:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:43:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:43:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:43:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:43:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:43:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:43:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-18 16:43:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:43:36,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:43:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:43:36,224 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:43:36,226 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:43:36,488 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-18 16:43:36,488 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:43:36,505 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:43:36,506 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-18 16:43:36,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:43:36 BoogieIcfgContainer [2024-09-18 16:43:36,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:43:36,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:43:36,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:43:36,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:43:36,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:43:35" (1/3) ... [2024-09-18 16:43:36,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2884be1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:43:36, skipping insertion in model container [2024-09-18 16:43:36,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:43:35" (2/3) ... [2024-09-18 16:43:36,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2884be1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:43:36, skipping insertion in model container [2024-09-18 16:43:36,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:43:36" (3/3) ... [2024-09-18 16:43:36,514 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_4.i [2024-09-18 16:43:36,528 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:43:36,528 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:43:36,575 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:43:36,581 INFO L336 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=All, 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;@6a587530, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:43:36,581 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:43:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 16:43:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 16:43:36,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:43:36,592 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:43:36,592 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:43:36,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:43:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1822521200, now seen corresponding path program 1 times [2024-09-18 16:43:36,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:43:36,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353041597] [2024-09-18 16:43:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:43:36,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:43:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:36,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:43:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:36,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:43:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:36,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:43:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:36,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:43:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:43:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:43:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353041597] [2024-09-18 16:43:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353041597] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:43:36,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:43:36,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 16:43:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581910436] [2024-09-18 16:43:36,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:43:36,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 16:43:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:43:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 16:43:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:43:36,906 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:43:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:43:37,090 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-18 16:43:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 16:43:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-18 16:43:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:43:37,100 INFO L225 Difference]: With dead ends: 102 [2024-09-18 16:43:37,100 INFO L226 Difference]: Without dead ends: 56 [2024-09-18 16:43:37,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:43:37,106 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:43:37,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 28 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:43:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-18 16:43:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2024-09-18 16:43:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:43:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-09-18 16:43:37,148 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2024-09-18 16:43:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:43:37,149 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-09-18 16:43:37,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:43:37,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:43:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-09-18 16:43:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 16:43:37,152 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:43:37,152 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:43:37,152 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:43:37,153 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:43:37,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:43:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash 86541932, now seen corresponding path program 1 times [2024-09-18 16:43:37,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:43:37,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792549722] [2024-09-18 16:43:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:43:37,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:43:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:37,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:43:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:37,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:43:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:37,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:43:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:37,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:43:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:43:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:43:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792549722] [2024-09-18 16:43:37,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792549722] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:43:37,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:43:37,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:43:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593290120] [2024-09-18 16:43:37,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:43:37,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:43:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:43:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:43:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:43:37,635 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-18 16:43:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:43:37,870 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-09-18 16:43:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:43:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-09-18 16:43:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:43:37,872 INFO L225 Difference]: With dead ends: 81 [2024-09-18 16:43:37,874 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 16:43:37,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:43:37,875 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:43:37,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 49 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:43:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 16:43:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-18 16:43:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-18 16:43:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-09-18 16:43:37,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2024-09-18 16:43:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:43:37,895 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-09-18 16:43:37,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-18 16:43:37,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:43:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-09-18 16:43:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:43:37,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:43:37,896 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:43:37,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:43:37,896 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:43:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:43:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -685815108, now seen corresponding path program 1 times [2024-09-18 16:43:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:43:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918877934] [2024-09-18 16:43:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:43:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:43:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:43:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:43:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:43:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:43:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 16:43:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 16:43:38,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:43:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918877934] [2024-09-18 16:43:38,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918877934] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:43:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776104216] [2024-09-18 16:43:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:43:38,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:43:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:43:38,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:43:38,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:43:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:43:38,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 16:43:38,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:43:38,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-18 16:43:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:43:38,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:43:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 16:43:39,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776104216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:43:39,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:43:39,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2024-09-18 16:43:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434438397] [2024-09-18 16:43:39,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:43:39,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 16:43:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:43:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 16:43:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2024-09-18 16:43:39,375 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-18 16:43:43,427 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] [2024-09-18 16:43:47,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:43:51,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:43:55,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:00,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:04,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:12,657 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] [2024-09-18 16:44:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:44:12,657 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2024-09-18 16:44:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 16:44:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 36 [2024-09-18 16:44:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:44:12,661 INFO L225 Difference]: With dead ends: 116 [2024-09-18 16:44:12,662 INFO L226 Difference]: Without dead ends: 80 [2024-09-18 16:44:12,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 16:44:12,663 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 35 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2024-09-18 16:44:12,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 170 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 843 Invalid, 8 Unknown, 0 Unchecked, 32.7s Time] [2024-09-18 16:44:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-18 16:44:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2024-09-18 16:44:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-18 16:44:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2024-09-18 16:44:12,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 36 [2024-09-18 16:44:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:44:12,686 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2024-09-18 16:44:12,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-18 16:44:12,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2024-09-18 16:44:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 16:44:12,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:44:12,688 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-09-18 16:44:12,706 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:44:12,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:12,893 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:44:12,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash -908744810, now seen corresponding path program 1 times [2024-09-18 16:44:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:44:12,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765397812] [2024-09-18 16:44:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:44:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:44:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:44:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:44:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 16:44:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 16:44:13,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:44:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765397812] [2024-09-18 16:44:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765397812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:44:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103150598] [2024-09-18 16:44:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:13,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:44:13,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:44:13,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:44:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:13,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-18 16:44:13,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:44:13,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-18 16:44:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-18 16:44:14,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:44:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103150598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:44:14,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:44:14,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2024-09-18 16:44:14,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729781682] [2024-09-18 16:44:14,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:44:14,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:44:14,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:44:14,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:44:14,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:44:14,088 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:44:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:44:14,336 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-09-18 16:44:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:44:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-09-18 16:44:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:44:14,338 INFO L225 Difference]: With dead ends: 81 [2024-09-18 16:44:14,338 INFO L226 Difference]: Without dead ends: 79 [2024-09-18 16:44:14,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2024-09-18 16:44:14,339 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:44:14,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 349 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:44:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-18 16:44:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-18 16:44:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-18 16:44:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2024-09-18 16:44:14,354 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 41 [2024-09-18 16:44:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:44:14,354 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2024-09-18 16:44:14,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:44:14,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2024-09-18 16:44:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:44:14,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:44:14,356 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:44:14,373 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:44:14,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:14,561 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:44:14,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1404730042, now seen corresponding path program 1 times [2024-09-18 16:44:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:44:14,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828308275] [2024-09-18 16:44:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:14,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:44:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:14,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:44:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:14,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:44:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:44:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 16:44:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:44:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 16:44:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:44:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828308275] [2024-09-18 16:44:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828308275] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:44:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808384691] [2024-09-18 16:44:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:15,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:44:15,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:44:15,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:44:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:15,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:44:15,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:44:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 16:44:15,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:44:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808384691] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:44:15,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:44:15,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-09-18 16:44:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654444564] [2024-09-18 16:44:15,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:44:15,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:44:15,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:44:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:44:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:44:15,684 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:44:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:44:15,902 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2024-09-18 16:44:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:44:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-09-18 16:44:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:44:15,904 INFO L225 Difference]: With dead ends: 96 [2024-09-18 16:44:15,904 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 16:44:15,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:44:15,905 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:44:15,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 71 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:44:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 16:44:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-09-18 16:44:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 47 states have internal predecessors, (49), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 12 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-18 16:44:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-09-18 16:44:15,920 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 47 [2024-09-18 16:44:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:44:15,920 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-09-18 16:44:15,921 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:44:15,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-09-18 16:44:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 16:44:15,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:44:15,922 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:44:15,939 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:44:16,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:16,127 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:44:16,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:44:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1142626696, now seen corresponding path program 1 times [2024-09-18 16:44:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:44:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608699401] [2024-09-18 16:44:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:44:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:44:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:44:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:44:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:44:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 16:44:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:44:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 16:44:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-18 16:44:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:44:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608699401] [2024-09-18 16:44:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608699401] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:44:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199571388] [2024-09-18 16:44:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:44:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:44:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:44:16,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:44:16,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:44:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:44:16,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 16:44:16,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:44:17,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-18 16:44:17,694 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-18 16:44:17,694 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 52 treesize of output 63 [2024-09-18 16:44:17,746 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-18 16:44:17,746 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 59 treesize of output 66 [2024-09-18 16:44:18,200 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 40 treesize of output 28 [2024-09-18 16:44:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 16:44:18,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:44:19,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2024-09-18 16:44:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 16:44:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199571388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:44:19,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:44:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 33 [2024-09-18 16:44:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942114079] [2024-09-18 16:44:19,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:44:19,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-18 16:44:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:44:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-18 16:44:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 16:44:19,148 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 33 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-18 16:44:23,171 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] [2024-09-18 16:44:27,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:31,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:35,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:39,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:44,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:48,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:52,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:44:57,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:01,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:18,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:22,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:28,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:32,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-18 16:45:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:45:32,444 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2024-09-18 16:45:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 16:45:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) Word has length 57 [2024-09-18 16:45:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:45:32,446 INFO L225 Difference]: With dead ends: 144 [2024-09-18 16:45:32,446 INFO L226 Difference]: Without dead ends: 88 [2024-09-18 16:45:32,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=428, Invalid=3601, Unknown=3, NotChecked=0, Total=4032 [2024-09-18 16:45:32,448 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 58 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.7s IncrementalHoareTripleChecker+Time [2024-09-18 16:45:32,449 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 252 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1391 Invalid, 14 Unknown, 0 Unchecked, 58.7s Time] [2024-09-18 16:45:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-18 16:45:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2024-09-18 16:45:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-18 16:45:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2024-09-18 16:45:32,475 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 57 [2024-09-18 16:45:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:45:32,476 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2024-09-18 16:45:32,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-18 16:45:32,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:45:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2024-09-18 16:45:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:45:32,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:45:32,480 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:45:32,496 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:45:32,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:45:32,684 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:45:32,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:45:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -660333559, now seen corresponding path program 1 times [2024-09-18 16:45:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:45:32,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967729999] [2024-09-18 16:45:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:45:32,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:45:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:45:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:45:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:45:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:45:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:45:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 16:45:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 16:45:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:45:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-18 16:45:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-18 16:45:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 16:45:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 16:45:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:45:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967729999] [2024-09-18 16:45:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967729999] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:45:33,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148011373] [2024-09-18 16:45:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:45:33,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:45:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:45:33,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:45:33,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:45:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:45:34,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-18 16:45:34,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:45:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-18 16:45:34,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:45:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 16:45:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148011373] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:45:48,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:45:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 18] total 41 [2024-09-18 16:45:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406302825] [2024-09-18 16:45:48,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:45:48,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-18 16:45:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:45:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-18 16:45:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1450, Unknown=3, NotChecked=0, Total=1640 [2024-09-18 16:45:48,049 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 41 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 34 states have internal predecessors, (72), 12 states have call successors, (28), 9 states have call predecessors, (28), 14 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-18 16:45:52,648 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 [] [2024-09-18 16:45:56,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:00,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:04,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:24,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:28,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:32,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:36,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:40,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:44,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:48,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:52,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:46:56,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:00,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:04,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:21,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:25,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:29,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:33,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:37,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:41,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:45,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:49,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:53,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:47:57,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:48:01,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:48:05,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-18 16:48:09,215 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 [] [2024-09-18 16:48:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:10,611 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2024-09-18 16:48:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 16:48:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 34 states have internal predecessors, (72), 12 states have call successors, (28), 9 states have call predecessors, (28), 14 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) Word has length 70 [2024-09-18 16:48:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:10,614 INFO L225 Difference]: With dead ends: 152 [2024-09-18 16:48:10,614 INFO L226 Difference]: Without dead ends: 98 [2024-09-18 16:48:10,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=634, Invalid=3912, Unknown=10, NotChecked=0, Total=4556 [2024-09-18 16:48:10,617 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 192 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 180 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:10,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 126 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1129 Invalid, 28 Unknown, 0 Unchecked, 113.3s Time] [2024-09-18 16:48:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-18 16:48:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2024-09-18 16:48:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 16 states have call successors, (16), 14 states have call predecessors, (16), 17 states have return successors, (19), 17 states have call predecessors, (19), 13 states have call successors, (19) [2024-09-18 16:48:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2024-09-18 16:48:10,651 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 70 [2024-09-18 16:48:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:10,651 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2024-09-18 16:48:10,652 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 34 states have internal predecessors, (72), 12 states have call successors, (28), 9 states have call predecessors, (28), 14 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-18 16:48:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2024-09-18 16:48:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-18 16:48:10,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:10,657 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:10,677 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:10,858 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:48:10,859 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:10,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1668778941, now seen corresponding path program 2 times [2024-09-18 16:48:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627543089] [2024-09-18 16:48:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat