./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c --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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_nla-digbench/recursified_lcm1.c -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 e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 --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-6908dde-m [2024-09-25 00:18:36,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:18:36,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:18:36,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:18:36,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:18:36,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:18:36,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:18:36,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:18:36,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:18:36,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:18:36,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:18:36,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:18:36,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:18:36,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:18:36,977 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:18:36,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:18:36,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:18:36,978 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:18:36,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:18:36,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:18:36,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:18:36,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:18:36,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:18:36,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:18:36,981 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:18:36,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:18:36,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:18:36,982 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:18:36,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:18:36,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:18:36,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:18:36,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:18:36,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:36,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:18:36,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:18:36,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:18:36,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:18:36,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:18:36,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:18:36,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:18:36,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:18:36,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:18:36,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:18:37,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:18:37,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:18:37,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:18:37,292 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:18:37,293 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:18:37,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-25 00:18:38,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:18:38,959 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:18:38,960 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-25 00:18:38,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3e635f891/67c45b91d5b4462c9e5fb0182c97cddc/FLAGf8121a2dd [2024-09-25 00:18:38,987 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3e635f891/67c45b91d5b4462c9e5fb0182c97cddc [2024-09-25 00:18:38,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:18:38,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:18:38,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:38,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:18:39,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:18:39,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:38" (1/1) ... [2024-09-25 00:18:39,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c62ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39, skipping insertion in model container [2024-09-25 00:18:39,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:38" (1/1) ... [2024-09-25 00:18:39,026 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:18:39,178 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_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-25 00:18:39,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:39,219 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:18:39,229 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_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-25 00:18:39,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:39,267 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:18:39,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39 WrapperNode [2024-09-25 00:18:39,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:39,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:39,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:18:39,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:18:39,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,293 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:18:39,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:39,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:18:39,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:18:39,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:18:39,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,335 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [8, 2, 7, 11, 13, 8, 9, 8]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [0, 2, 7, 0, 0, 0, 0, 0]. The 10 writes are split as follows [2, 0, 0, 2, 2, 1, 1, 2]. [2024-09-25 00:18:39,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:18:39,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:18:39,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:18:39,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:18:39,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (1/1) ... [2024-09-25 00:18:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:39,389 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) [2024-09-25 00:18:39,391 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 [2024-09-25 00:18:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:18:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-25 00:18:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-25 00:18:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-25 00:18:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-25 00:18:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 00:18:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 00:18:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:18:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:18:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:18:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 00:18:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-25 00:18:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-25 00:18:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-25 00:18:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:18:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 00:18:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-25 00:18:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:18:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:18:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:18:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:18:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:18:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 00:18:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-25 00:18:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:18:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:18:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:18:39,565 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:18:39,567 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:18:39,928 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 00:18:39,928 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:18:39,960 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:18:39,960 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 00:18:39,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:39 BoogieIcfgContainer [2024-09-25 00:18:39,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:18:39,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:18:39,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:18:39,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:18:39,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:18:38" (1/3) ... [2024-09-25 00:18:39,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0a1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:39, skipping insertion in model container [2024-09-25 00:18:39,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:39" (2/3) ... [2024-09-25 00:18:39,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0a1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:39, skipping insertion in model container [2024-09-25 00:18:39,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:39" (3/3) ... [2024-09-25 00:18:39,976 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-25 00:18:39,990 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:18:39,991 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:18:40,058 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:18:40,069 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;@6286d984, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:18:40,070 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:18:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 00:18:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:18:40,089 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:40,090 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:40,090 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-25 00:18:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698519334] [2024-09-25 00:18:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:18:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:18:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 00:18:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 00:18:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:18:40,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:40,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698519334] [2024-09-25 00:18:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698519334] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:40,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 00:18:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062378609] [2024-09-25 00:18:40,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:40,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 00:18:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 00:18:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 00:18:40,465 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 00:18:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:40,503 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-25 00:18:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 00:18:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 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 36 [2024-09-25 00:18:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:40,511 INFO L225 Difference]: With dead ends: 110 [2024-09-25 00:18:40,512 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 00:18:40,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 00:18:40,521 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:40,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:18:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 00:18:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 00:18:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 00:18:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-25 00:18:40,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-25 00:18:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:40,564 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-25 00:18:40,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 00:18:40,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-25 00:18:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:18:40,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:40,567 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:40,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:18:40,571 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:40,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-25 00:18:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266047867] [2024-09-25 00:18:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:40,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626219186] [2024-09-25 00:18:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:40,696 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) [2024-09-25 00:18:40,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:18:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:40,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-25 00:18:40,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:40,984 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 [2024-09-25 00:18:40,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:41,016 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 11 [2024-09-25 00:18:41,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:41,040 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 11 [2024-09-25 00:18:41,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:41,244 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 15 treesize of output 7 [2024-09-25 00:18:41,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:41,263 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 15 treesize of output 7 [2024-09-25 00:18:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:18:41,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:18:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266047867] [2024-09-25 00:18:41,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626219186] [2024-09-25 00:18:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626219186] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:18:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556327878] [2024-09-25 00:18:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:41,332 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:18:41,334 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 00:18:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:41,645 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-25 00:18:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:18:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-25 00:18:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:41,649 INFO L225 Difference]: With dead ends: 69 [2024-09-25 00:18:41,649 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 00:18:41,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:41,651 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:41,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 348 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 00:18:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-25 00:18:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.131578947368421) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-25 00:18:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-25 00:18:41,672 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-25 00:18:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:41,673 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-25 00:18:41,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 00:18:41,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-25 00:18:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 00:18:41,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:41,675 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-25 00:18:41,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:18:41,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:41,880 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:41,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-25 00:18:41,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:41,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479185272] [2024-09-25 00:18:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:41,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052368549] [2024-09-25 00:18:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:41,970 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) [2024-09-25 00:18:41,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:18:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:42,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-25 00:18:42,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:42,242 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 [2024-09-25 00:18:42,244 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 [2024-09-25 00:18:42,262 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 11 [2024-09-25 00:18:42,270 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 11 [2024-09-25 00:18:42,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:42,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:42,651 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 15 treesize of output 7 [2024-09-25 00:18:42,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:42,668 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 15 treesize of output 7 [2024-09-25 00:18:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:18:42,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:47,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479185272] [2024-09-25 00:18:47,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052368549] [2024-09-25 00:18:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052368549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:47,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:18:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-25 00:18:47,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431225862] [2024-09-25 00:18:47,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:47,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 00:18:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 00:18:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2024-09-25 00:18:48,002 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 00:18:52,754 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] [2024-09-25 00:18:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:52,831 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-09-25 00:18:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:18:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-25 00:18:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:52,835 INFO L225 Difference]: With dead ends: 115 [2024-09-25 00:18:52,835 INFO L226 Difference]: Without dead ends: 113 [2024-09-25 00:18:52,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=69, Invalid=310, Unknown=1, NotChecked=0, Total=380 [2024-09-25 00:18:52,837 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:52,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 400 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-25 00:18:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-25 00:18:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-25 00:18:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2024-09-25 00:18:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-09-25 00:18:52,873 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 46 [2024-09-25 00:18:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:52,874 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-09-25 00:18:52,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 00:18:52,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-09-25 00:18:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 00:18:52,876 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:52,876 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-25 00:18:52,886 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:18:53,080 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:53,081 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:53,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-25 00:18:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:53,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282064400] [2024-09-25 00:18:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777317385] [2024-09-25 00:18:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:53,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:53,179 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) [2024-09-25 00:18:53,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process