./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.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 27b49876 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_2.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 a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 --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-27b4987-m [2024-09-21 12:30:20,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:30:20,588 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:30:20,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:30:20,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:30:20,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:30:20,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:30:20,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:30:20,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:30:20,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:30:20,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:30:20,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:30:20,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:30:20,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:30:20,631 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:30:20,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:30:20,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:30:20,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:30:20,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:30:20,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:30:20,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:30:20,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:30:20,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:30:20,637 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:30:20,637 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:30:20,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:30:20,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:30:20,638 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:30:20,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:30:20,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:30:20,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:30:20,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:30:20,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:20,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:30:20,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:30:20,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:30:20,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:30:20,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:30:20,648 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:30:20,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:30:20,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:30:20,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:30:20,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:30:20,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:30:20,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:30:20,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:30:20,933 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:30:20,934 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:30:20,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-09-21 12:30:22,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:30:22,541 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:30:22,542 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-09-21 12:30:22,549 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fb29e2a1d/14cac30a078f48f4a883a9000e15f8fc/FLAG8ce775a28 [2024-09-21 12:30:22,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fb29e2a1d/14cac30a078f48f4a883a9000e15f8fc [2024-09-21 12:30:22,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:30:22,565 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:30:22,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:22,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:30:22,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:30:22,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760399d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22, skipping insertion in model container [2024-09-21 12:30:22,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,595 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:30:22,748 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_2.i[1800,1813] [2024-09-21 12:30:22,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:22,771 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:30:22,782 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_2.i[1800,1813] [2024-09-21 12:30:22,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:22,802 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:30:22,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22 WrapperNode [2024-09-21 12:30:22,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:22,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:22,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:30:22,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:30:22,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,825 INFO L138 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:30:22,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:22,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:30:22,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:30:22,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:30:22,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,853 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 12, 2]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 4, 1]. [2024-09-21 12:30:22,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,863 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:30:22,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:30:22,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:30:22,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:30:22,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (1/1) ... [2024-09-21 12:30:22,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:22,902 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) [2024-09-21 12:30:22,905 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 [2024-09-21 12:30:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:30:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:30:22,947 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:30:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:30:22,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:30:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:30:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:30:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:30:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:30:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2024-09-21 12:30:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2024-09-21 12:30:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2024-09-21 12:30:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2024-09-21 12:30:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:30:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:30:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:30:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:30:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:30:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:30:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:30:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:30:23,027 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:30:23,029 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:30:23,174 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 12:30:23,174 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:30:23,192 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:30:23,193 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:30:23,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:23 BoogieIcfgContainer [2024-09-21 12:30:23,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:30:23,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:30:23,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:30:23,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:30:23,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:30:22" (1/3) ... [2024-09-21 12:30:23,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:23, skipping insertion in model container [2024-09-21 12:30:23,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:22" (2/3) ... [2024-09-21 12:30:23,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:23, skipping insertion in model container [2024-09-21 12:30:23,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:23" (3/3) ... [2024-09-21 12:30:23,201 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_2.i [2024-09-21 12:30:23,216 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:30:23,216 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:30:23,289 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:30:23,294 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;@5d2167d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:30:23,294 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:30:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:30:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 12:30:23,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:23,309 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:23,309 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:23,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash -76584524, now seen corresponding path program 1 times [2024-09-21 12:30:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291030740] [2024-09-21 12:30:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:23,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:24,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:30:24,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:24,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291030740] [2024-09-21 12:30:24,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291030740] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:24,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:24,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-21 12:30:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99667715] [2024-09-21 12:30:24,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:24,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-21 12:30:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-21 12:30:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:30:24,134 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:30:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:24,351 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2024-09-21 12:30:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 12:30:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-21 12:30:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:24,362 INFO L225 Difference]: With dead ends: 71 [2024-09-21 12:30:24,362 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 12:30:24,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:30:24,370 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:24,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:30:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 12:30:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-21 12:30:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 12:30:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-09-21 12:30:24,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2024-09-21 12:30:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:24,413 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-09-21 12:30:24,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:30:24,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-09-21 12:30:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-21 12:30:24,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:24,417 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-21 12:30:24,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:30:24,418 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:24,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1452196032, now seen corresponding path program 1 times [2024-09-21 12:30:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:24,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651339775] [2024-09-21 12:30:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:24,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:24,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:25,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:25,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:30:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:30:25,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:25,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651339775] [2024-09-21 12:30:25,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651339775] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:25,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966833257] [2024-09-21 12:30:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:25,259 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) [2024-09-21 12:30:25,261 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:30:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:25,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-21 12:30:25,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:25,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:30:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:30:25,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:30:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966833257] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:26,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2024-09-21 12:30:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569107586] [2024-09-21 12:30:26,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:26,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:30:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:30:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-09-21 12:30:26,151 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-21 12:30:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:26,748 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-21 12:30:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:30:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 29 [2024-09-21 12:30:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:26,750 INFO L225 Difference]: With dead ends: 58 [2024-09-21 12:30:26,751 INFO L226 Difference]: Without dead ends: 45 [2024-09-21 12:30:26,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:30:26,754 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:26,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 41 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:30:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-21 12:30:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-21 12:30:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-21 12:30:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-21 12:30:26,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2024-09-21 12:30:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:26,773 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-21 12:30:26,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-21 12:30:26,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-21 12:30:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-21 12:30:26,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:26,775 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:26,792 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:30:26,976 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:26,976 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:26,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1166567816, now seen corresponding path program 2 times [2024-09-21 12:30:26,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:26,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49523949] [2024-09-21 12:30:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:26,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:27,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:27,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:28,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:28,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:30:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:28,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:30:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:30:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:30:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-21 12:30:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49523949] [2024-09-21 12:30:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49523949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145270558] [2024-09-21 12:30:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:30:29,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:29,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:29,668 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) [2024-09-21 12:30:29,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:30:29,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:30:29,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:29,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-21 12:30:29,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:29,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:30:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-21 12:30:30,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:30:56,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145270558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:56,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:56,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 22] total 51 [2024-09-21 12:30:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165026161] [2024-09-21 12:30:56,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:56,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-21 12:30:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:56,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-21 12:30:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2274, Unknown=6, NotChecked=0, Total=2550 [2024-09-21 12:30:56,602 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 51 states, 40 states have (on average 1.5) internal successors, (60), 44 states have internal predecessors, (60), 22 states have call successors, (25), 9 states have call predecessors, (25), 16 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2024-09-21 12:31:28,882 WARN L293 SmtUtils]: Spent 28.13s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 12:31:45,219 WARN L293 SmtUtils]: Spent 16.14s on a formula simplification. DAG size of input: 76 DAG size of output: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 12:32:09,909 WARN L293 SmtUtils]: Spent 24.17s on a formula simplification. DAG size of input: 69 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 12:32:30,303 WARN L293 SmtUtils]: Spent 20.19s on a formula simplification. DAG size of input: 62 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 12:32:34,319 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 [] [2024-09-21 12:32:38,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:32:42,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:32:46,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:32:50,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:32:54,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:22,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:26,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:30,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:34,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:38,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:33:42,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:02,793 WARN L293 SmtUtils]: Spent 20.14s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 12:34:06,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:10,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:14,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:18,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:22,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:26,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:31,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:35,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:39,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:43,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:47,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-21 12:34:51,077 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 []