./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 [2024-09-17 19:23:08,098 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:23:08,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:23:08,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:23:08,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:23:08,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:23:08,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:23:08,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:23:08,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:23:08,211 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:23:08,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:23:08,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:23:08,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:23:08,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:23:08,212 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:23:08,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:23:08,212 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:23:08,213 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:23:08,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:23:08,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:23:08,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:23:08,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:23:08,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:23:08,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:23:08,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:23:08,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:23:08,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:23:08,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:23:08,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:23:08,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:23:08,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:23:08,220 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:23:08,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:23:08,220 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:23:08,220 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:23:08,220 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:23:08,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:23:08,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:23:08,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:23:08,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:23:08,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:23:08,452 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:23:08,452 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:23:08,453 INFO L431 ainManager$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 [2024-09-17 19:23:09,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:23:10,008 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:23:10,008 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2024-09-17 19:23:10,016 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/535b855ce/03c9e41318b74eb098d76bc75f77ce8b/FLAG3a557cbad [2024-09-17 19:23:10,029 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/535b855ce/03c9e41318b74eb098d76bc75f77ce8b [2024-09-17 19:23:10,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:23:10,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:23:10,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:23:10,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:23:10,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:23:10,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f424225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10, skipping insertion in model container [2024-09-17 19:23:10,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,061 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:23:10,186 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] [2024-09-17 19:23:10,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:23:10,207 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:23:10,215 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] [2024-09-17 19:23:10,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:23:10,241 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:23:10,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10 WrapperNode [2024-09-17 19:23:10,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:23:10,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:23:10,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:23:10,243 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:23:10,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,265 INFO L138 Inliner]: procedures = 20, calls = 62, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:23:10,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:23:10,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:23:10,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:23:10,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:23:10,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,279 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,295 INFO L175 MemorySlicer]: Split 37 memory accesses to 6 slices as follows [2, 5, 3, 5, 11, 11]. 30 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 1, 1, 0, 0]. The 9 writes are split as follows [0, 1, 1, 1, 3, 3]. [2024-09-17 19:23:10,295 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,295 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:23:10,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:23:10,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:23:10,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:23:10,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (1/1) ... [2024-09-17 19:23:10,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:23:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:10,341 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) [2024-09-17 19:23:10,351 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 [2024-09-17 19:23:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_41_0 [2024-09-17 19:23:10,384 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_41_0 [2024-09-17 19:23:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:23:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_49_to_54_0 [2024-09-17 19:23:10,384 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_49_to_54_0 [2024-09-17 19:23:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 19:23:10,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 19:23:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:23:10,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:23:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-17 19:23:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:23:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_58_to_61_0 [2024-09-17 19:23:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_58_to_61_0 [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:23:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 19:23:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 19:23:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 19:23:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 19:23:10,468 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:23:10,469 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:23:10,649 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-17 19:23:10,649 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:23:10,664 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:23:10,664 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:23:10,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:23:10 BoogieIcfgContainer [2024-09-17 19:23:10,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:23:10,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:23:10,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:23:10,668 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:23:10,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:23:10" (1/3) ... [2024-09-17 19:23:10,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fdc19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:23:10, skipping insertion in model container [2024-09-17 19:23:10,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:23:10" (2/3) ... [2024-09-17 19:23:10,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fdc19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:23:10, skipping insertion in model container [2024-09-17 19:23:10,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:23:10" (3/3) ... [2024-09-17 19:23:10,670 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_4.i [2024-09-17 19:23:10,683 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:23:10,684 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:23:10,724 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:23:10,729 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;@32c1f625, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:23:10,729 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:23:10,732 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) [2024-09-17 19:23:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:23:10,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:10,738 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] [2024-09-17 19:23:10,738 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:10,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1822521200, now seen corresponding path program 1 times [2024-09-17 19:23:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426081700] [2024-09-17 19:23:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:10,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:10,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:10,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:23:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:10,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:23:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:23:11,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426081700] [2024-09-17 19:23:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426081700] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:11,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:23:11,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:23:11,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074920318] [2024-09-17 19:23:11,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:11,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:23:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:23:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:23:11,028 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) [2024-09-17 19:23:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:11,177 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-17 19:23:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:23:11,179 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 [2024-09-17 19:23:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:11,187 INFO L225 Difference]: With dead ends: 102 [2024-09-17 19:23:11,187 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 19:23:11,190 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 [2024-09-17 19:23:11,194 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 [2024-09-17 19:23:11,195 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] [2024-09-17 19:23:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 19:23:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2024-09-17 19:23:11,230 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) [2024-09-17 19:23:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-09-17 19:23:11,233 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2024-09-17 19:23:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:11,234 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-09-17 19:23:11,234 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) [2024-09-17 19:23:11,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-09-17 19:23:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:23:11,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:11,238 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] [2024-09-17 19:23:11,238 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:23:11,238 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:11,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash 86541932, now seen corresponding path program 1 times [2024-09-17 19:23:11,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506723341] [2024-09-17 19:23:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:23:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:23:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:23:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506723341] [2024-09-17 19:23:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506723341] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:11,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:23:11,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 19:23:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438813063] [2024-09-17 19:23:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:11,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:23:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:23:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:23:11,543 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) [2024-09-17 19:23:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:11,698 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-09-17 19:23:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:23:11,699 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 [2024-09-17 19:23:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:11,699 INFO L225 Difference]: With dead ends: 81 [2024-09-17 19:23:11,700 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 19:23:11,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-17 19:23:11,701 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:23:11,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 49 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:23:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 19:23:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-17 19:23:11,707 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) [2024-09-17 19:23:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-09-17 19:23:11,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2024-09-17 19:23:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:11,709 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-09-17 19:23:11,709 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) [2024-09-17 19:23:11,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-09-17 19:23:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 19:23:11,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:11,710 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] [2024-09-17 19:23:11,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:23:11,710 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:11,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -685815108, now seen corresponding path program 1 times [2024-09-17 19:23:11,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:11,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550035412] [2024-09-17 19:23:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:11,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:12,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:12,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:23:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:12,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 19:23:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:23:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550035412] [2024-09-17 19:23:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550035412] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:12,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074729862] [2024-09-17 19:23:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:12,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:12,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:12,291 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) [2024-09-17 19:23:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:23:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:12,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 19:23:12,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:23:12,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:23:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:23:13,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074729862] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:23:13,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:23:13,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-09-17 19:23:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201594833] [2024-09-17 19:23:13,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:23:13,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 19:23:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 19:23:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:23:13,091 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:23:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:13,593 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2024-09-17 19:23:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:23:13,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) Word has length 36 [2024-09-17 19:23:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:13,596 INFO L225 Difference]: With dead ends: 92 [2024-09-17 19:23:13,596 INFO L226 Difference]: Without dead ends: 58 [2024-09-17 19:23:13,597 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:23:13,597 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:23:13,598 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 100 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:23:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-17 19:23:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-17 19:23:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-17 19:23:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-09-17 19:23:13,612 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 36 [2024-09-17 19:23:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:13,613 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-09-17 19:23:13,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:23:13,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-09-17 19:23:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 19:23:13,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:13,615 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-09-17 19:23:13,642 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 19:23:13,815 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 [2024-09-17 19:23:13,816 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 988938436, now seen corresponding path program 2 times [2024-09-17 19:23:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887390707] [2024-09-17 19:23:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:14,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:14,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:14,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:14,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:15,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:15,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:15,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:23:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:15,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:23:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:23:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887390707] [2024-09-17 19:23:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887390707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590961417] [2024-09-17 19:23:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:23:15,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:15,366 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) [2024-09-17 19:23:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:23:15,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:23:15,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:23:15,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 19:23:15,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:15,521 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 [2024-09-17 19:23:15,656 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 17 treesize of output 9 [2024-09-17 19:23:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-17 19:23:15,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:23:15,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590961417] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:15,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:23:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 26 [2024-09-17 19:23:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750959741] [2024-09-17 19:23:15,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:15,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 19:23:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 19:23:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:23:15,736 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:23:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:15,881 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2024-09-17 19:23:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:23:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2024-09-17 19:23:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:15,882 INFO L225 Difference]: With dead ends: 96 [2024-09-17 19:23:15,882 INFO L226 Difference]: Without dead ends: 68 [2024-09-17 19:23:15,883 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:23:15,884 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:23:15,884 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 259 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:23:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-17 19:23:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-09-17 19:23:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-09-17 19:23:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2024-09-17 19:23:15,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 51 [2024-09-17 19:23:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:15,894 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2024-09-17 19:23:15,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:23:15,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2024-09-17 19:23:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 19:23:15,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:15,898 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-09-17 19:23:15,918 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:23:16,102 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 [2024-09-17 19:23:16,103 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:16,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash 987091394, now seen corresponding path program 1 times [2024-09-17 19:23:16,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382659954] [2024-09-17 19:23:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:16,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:16,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:16,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:23:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:23:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:23:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382659954] [2024-09-17 19:23:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382659954] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407303558] [2024-09-17 19:23:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:17,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:17,443 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) [2024-09-17 19:23:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:23:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:17,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-17 19:23:17,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:17,552 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 [2024-09-17 19:23:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-17 19:23:17,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:23:17,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407303558] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:17,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:23:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 27 [2024-09-17 19:23:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542928604] [2024-09-17 19:23:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:17,746 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 19:23:17,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 19:23:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:23:17,747 INFO L87 Difference]: Start difference. First operand 61 states and 71 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) [2024-09-17 19:23:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:17,940 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2024-09-17 19:23:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 19:23:17,941 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 51 [2024-09-17 19:23:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:17,942 INFO L225 Difference]: With dead ends: 74 [2024-09-17 19:23:17,942 INFO L226 Difference]: Without dead ends: 72 [2024-09-17 19:23:17,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:23:17,943 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 [2024-09-17 19:23:17,943 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] [2024-09-17 19:23:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-17 19:23:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-09-17 19:23:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 43 states have internal predecessors, (45), 15 states have call successors, (15), 10 states have call predecessors, (15), 11 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-17 19:23:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2024-09-17 19:23:17,952 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2024-09-17 19:23:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:17,953 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2024-09-17 19:23:17,953 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) [2024-09-17 19:23:17,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2024-09-17 19:23:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-17 19:23:17,954 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:17,954 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2024-09-17 19:23:17,970 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 19:23:18,158 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 [2024-09-17 19:23:18,159 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:18,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash 982539890, now seen corresponding path program 1 times [2024-09-17 19:23:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996614951] [2024-09-17 19:23:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:18,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:18,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:23:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:23:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 19:23:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:23:19,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:19,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996614951] [2024-09-17 19:23:19,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996614951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:19,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712278598] [2024-09-17 19:23:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:19,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:19,664 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) [2024-09-17 19:23:19,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:23:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:19,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 19:23:19,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-17 19:23:20,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:23:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712278598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:23:20,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:23:20,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [19] total 23 [2024-09-17 19:23:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560345662] [2024-09-17 19:23:20,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:23:20,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:23:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:23:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:23:20,069 INFO L87 Difference]: Start difference. First operand 66 states and 76 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) [2024-09-17 19:23:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:23:20,226 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-09-17 19:23:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:23:20,227 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 57 [2024-09-17 19:23:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:23:20,228 INFO L225 Difference]: With dead ends: 89 [2024-09-17 19:23:20,228 INFO L226 Difference]: Without dead ends: 73 [2024-09-17 19:23:20,228 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:23:20,229 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 [2024-09-17 19:23:20,229 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] [2024-09-17 19:23:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-17 19:23:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-09-17 19:23:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (17), 14 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-17 19:23:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2024-09-17 19:23:20,240 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 57 [2024-09-17 19:23:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:23:20,240 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2024-09-17 19:23:20,241 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) [2024-09-17 19:23:20,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2024-09-17 19:23:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-17 19:23:20,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:23:20,242 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 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] [2024-09-17 19:23:20,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:23:20,442 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 [2024-09-17 19:23:20,442 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:23:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:23:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1891199924, now seen corresponding path program 1 times [2024-09-17 19:23:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:23:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741959552] [2024-09-17 19:23:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:23:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:20,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:23:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:20,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:23:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:23:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 19:23:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:23:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 19:23:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 19:23:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-17 19:23:21,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:23:21,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741959552] [2024-09-17 19:23:21,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741959552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:23:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482905241] [2024-09-17 19:23:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:23:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:23:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:23:21,679 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) [2024-09-17 19:23:21,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:23:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:23:21,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-17 19:23:21,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:23:21,878 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 [2024-09-17 19:23:22,616 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-17 19:23:22,616 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 45 treesize of output 52 [2024-09-17 19:23:22,778 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 30 treesize of output 18 [2024-09-17 19:23:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-17 19:23:22,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:23:22,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-17 19:23:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-17 19:23:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482905241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:23:23,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:23:23,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 38 [2024-09-17 19:23:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372067478] [2024-09-17 19:23:23,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:23:23,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 19:23:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:23:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 19:23:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:23:23,335 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 38 states, 29 states have (on average 2.310344827586207) internal successors, (67), 34 states have internal predecessors, (67), 13 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-17 19:23:27,390 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] [2024-09-17 19:23:31,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:35,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:39,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:43,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:47,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:52,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:23:56,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:00,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:04,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:09,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:13,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:17,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:24:21,776 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] [2024-09-17 19:24:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:24:21,837 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2024-09-17 19:24:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 19:24:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 29 states have (on average 2.310344827586207) internal successors, (67), 34 states have internal predecessors, (67), 13 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) Word has length 67 [2024-09-17 19:24:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:24:21,839 INFO L225 Difference]: With dead ends: 140 [2024-09-17 19:24:21,839 INFO L226 Difference]: Without dead ends: 88 [2024-09-17 19:24:21,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=443, Invalid=4387, Unknown=0, NotChecked=0, Total=4830 [2024-09-17 19:24:21,841 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 85 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:24:21,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 253 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1561 Invalid, 14 Unknown, 0 Unchecked, 57.1s Time] [2024-09-17 19:24:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-17 19:24:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2024-09-17 19:24:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (16), 14 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-17 19:24:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2024-09-17 19:24:21,854 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 67 [2024-09-17 19:24:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:24:21,855 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2024-09-17 19:24:21,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 29 states have (on average 2.310344827586207) internal successors, (67), 34 states have internal predecessors, (67), 13 states have call successors, (25), 7 states have call predecessors, (25), 9 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-17 19:24:21,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2024-09-17 19:24:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 19:24:21,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:24:21,856 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2024-09-17 19:24:21,871 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:24:22,057 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 [2024-09-17 19:24:22,058 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:24:22,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:24:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash 755769013, now seen corresponding path program 1 times [2024-09-17 19:24:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:24:22,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751206238] [2024-09-17 19:24:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:22,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:24:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:22,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:24:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:22,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:24:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:23,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:24:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 19:24:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 19:24:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 19:24:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:24:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:24:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 19:24:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 19:24:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:24:24,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751206238] [2024-09-17 19:24:24,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751206238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:24:24,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677113825] [2024-09-17 19:24:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:24:24,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:24:24,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:24:24,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:24:24,279 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:24:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:24:24,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-09-17 19:24:24,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:24:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-17 19:24:25,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:25:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 19:25:07,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677113825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:25:07,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:25:07,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 26] total 57 [2024-09-17 19:25:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760213584] [2024-09-17 19:25:07,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:25:07,744 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-17 19:25:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:25:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-17 19:25:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2875, Unknown=10, NotChecked=0, Total=3192 [2024-09-17 19:25:07,746 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 57 states, 43 states have (on average 2.0) internal successors, (86), 48 states have internal predecessors, (86), 16 states have call successors, (32), 11 states have call predecessors, (32), 20 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2024-09-17 19:25:12,906 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 [] [2024-09-17 19:25:16,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:20,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:24,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:28,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:32,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:36,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:25:40,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:17,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:21,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:25,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:29,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:33,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:37,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:41,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:45,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:49,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:53,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:26:57,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:01,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:05,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:09,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:13,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:17,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:21,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:25,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:29,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:33,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:37,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:41,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-17 19:27:45,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []