./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_bin-suffix-5.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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-invariants/recursified_bin-suffix-5.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 c4cbc544f6c6468ca141cfd9a471f76e948b2a9f8c6c56806d9220760159bde9 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 03:43:30,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 03:43:30,140 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 03:43:30,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 03:43:30,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 03:43:30,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 03:43:30,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 03:43:30,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 03:43:30,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 03:43:30,180 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 03:43:30,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 03:43:30,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 03:43:30,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 03:43:30,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 03:43:30,183 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 03:43:30,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 03:43:30,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 03:43:30,185 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 03:43:30,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 03:43:30,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 03:43:30,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 03:43:30,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 03:43:30,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 03:43:30,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 03:43:30,188 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 03:43:30,189 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 03:43:30,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 03:43:30,189 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 03:43:30,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 03:43:30,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 03:43:30,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 03:43:30,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 03:43:30,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 03:43:30,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 03:43:30,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 03:43:30,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 03:43:30,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 03:43:30,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 03:43:30,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 03:43:30,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 03:43:30,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 03:43:30,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 03:43:30,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4cbc544f6c6468ca141cfd9a471f76e948b2a9f8c6c56806d9220760159bde9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 03:43:30,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 03:43:30,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 03:43:30,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 03:43:30,447 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 03:43:30,448 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 03:43:30,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-invariants/recursified_bin-suffix-5.c [2024-09-13 03:43:31,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 03:43:32,019 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 03:43:32,020 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_bin-suffix-5.c [2024-09-13 03:43:32,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3a0d25af8/c1885c4ddc5247d39e13af435bfe8ba0/FLAG5c4abd283 [2024-09-13 03:43:32,037 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3a0d25af8/c1885c4ddc5247d39e13af435bfe8ba0 [2024-09-13 03:43:32,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 03:43:32,040 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 03:43:32,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 03:43:32,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 03:43:32,046 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 03:43:32,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f8f557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32, skipping insertion in model container [2024-09-13 03:43:32,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,069 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 03:43:32,195 WARN L247 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-invariants/recursified_bin-suffix-5.c[986,999] [2024-09-13 03:43:32,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 03:43:32,216 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 03:43:32,227 WARN L247 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-invariants/recursified_bin-suffix-5.c[986,999] [2024-09-13 03:43:32,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 03:43:32,248 INFO L204 MainTranslator]: Completed translation [2024-09-13 03:43:32,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32 WrapperNode [2024-09-13 03:43:32,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 03:43:32,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 03:43:32,250 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 03:43:32,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 03:43:32,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,278 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 03:43:32,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 03:43:32,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 03:43:32,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 03:43:32,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 03:43:32,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,292 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,310 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 1 writes are split as follows [0, 1]. [2024-09-13 03:43:32,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,311 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 03:43:32,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 03:43:32,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 03:43:32,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 03:43:32,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (1/1) ... [2024-09-13 03:43:32,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 03:43:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 03:43:32,354 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) [2024-09-13 03:43:32,356 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 [2024-09-13 03:43:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 03:43:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2024-09-13 03:43:32,402 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2024-09-13 03:43:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 03:43:32,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 03:43:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 03:43:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 03:43:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 03:43:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 03:43:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 03:43:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 03:43:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 03:43:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 03:43:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 03:43:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 03:43:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 03:43:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 03:43:32,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 03:43:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 03:43:32,466 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 03:43:32,467 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 03:43:32,603 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-13 03:43:32,603 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 03:43:32,623 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 03:43:32,623 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 03:43:32,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:32 BoogieIcfgContainer [2024-09-13 03:43:32,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 03:43:32,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 03:43:32,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 03:43:32,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 03:43:32,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 03:43:32" (1/3) ... [2024-09-13 03:43:32,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68263189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 03:43:32, skipping insertion in model container [2024-09-13 03:43:32,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:32" (2/3) ... [2024-09-13 03:43:32,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68263189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 03:43:32, skipping insertion in model container [2024-09-13 03:43:32,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:32" (3/3) ... [2024-09-13 03:43:32,632 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bin-suffix-5.c [2024-09-13 03:43:32,648 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 03:43:32,648 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 03:43:32,693 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 03:43:32,699 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;@6be720cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 03:43:32,699 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 03:43:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 03:43:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 03:43:32,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:32,710 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:32,710 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -765542163, now seen corresponding path program 1 times [2024-09-13 03:43:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 03:43:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140455624] [2024-09-13 03:43:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 03:43:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 03:43:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 03:43:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 03:43:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 03:43:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140455624] [2024-09-13 03:43:33,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140455624] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 03:43:33,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 03:43:33,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 03:43:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496829468] [2024-09-13 03:43:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 03:43:33,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 03:43:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 03:43:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 03:43:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 03:43:33,274 INFO L87 Difference]: Start difference. First operand has 26 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:33,434 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-09-13 03:43:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 03:43:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-09-13 03:43:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:33,445 INFO L225 Difference]: With dead ends: 46 [2024-09-13 03:43:33,446 INFO L226 Difference]: Without dead ends: 26 [2024-09-13 03:43:33,449 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 03:43:33,454 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:33,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 03:43:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-13 03:43:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-13 03:43:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 03:43:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-13 03:43:33,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2024-09-13 03:43:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:33,492 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-13 03:43:33,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-13 03:43:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 03:43:33,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:33,495 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:33,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 03:43:33,495 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:33,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2069840394, now seen corresponding path program 1 times [2024-09-13 03:43:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 03:43:33,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762542755] [2024-09-13 03:43:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 03:43:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 03:43:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 03:43:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 03:43:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 03:43:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762542755] [2024-09-13 03:43:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762542755] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 03:43:33,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 03:43:33,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 03:43:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788812412] [2024-09-13 03:43:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 03:43:33,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 03:43:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 03:43:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 03:43:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 03:43:33,879 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:34,053 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-13 03:43:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 03:43:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-13 03:43:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:34,055 INFO L225 Difference]: With dead ends: 30 [2024-09-13 03:43:34,055 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 03:43:34,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-13 03:43:34,058 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:34,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 03:43:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 03:43:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-13 03:43:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 03:43:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-09-13 03:43:34,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2024-09-13 03:43:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:34,071 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-09-13 03:43:34,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:34,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-09-13 03:43:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-13 03:43:34,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:34,075 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:34,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 03:43:34,075 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:34,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1041063133, now seen corresponding path program 1 times [2024-09-13 03:43:34,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 03:43:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005284611] [2024-09-13 03:43:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 03:43:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:34,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 03:43:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:34,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 03:43:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:34,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 03:43:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 03:43:34,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 03:43:34,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005284611] [2024-09-13 03:43:34,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005284611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 03:43:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797560684] [2024-09-13 03:43:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:34,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 03:43:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 03:43:34,568 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) [2024-09-13 03:43:34,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 03:43:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:34,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 03:43:34,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 03:43:34,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 03:43:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 03:43:34,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 03:43:35,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 03:43:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 03:43:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797560684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 03:43:35,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 03:43:35,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2024-09-13 03:43:35,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14627127] [2024-09-13 03:43:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 03:43:35,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 03:43:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 03:43:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 03:43:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-13 03:43:35,257 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 19 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 03:43:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:35,800 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-09-13 03:43:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 03:43:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 21 [2024-09-13 03:43:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:35,801 INFO L225 Difference]: With dead ends: 38 [2024-09-13 03:43:35,802 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 03:43:35,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-09-13 03:43:35,803 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:35,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 03:43:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 03:43:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-09-13 03:43:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 03:43:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-09-13 03:43:35,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2024-09-13 03:43:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:35,812 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-09-13 03:43:35,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 03:43:35,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-09-13 03:43:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 03:43:35,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:35,814 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:35,831 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 03:43:36,017 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 [2024-09-13 03:43:36,018 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:36,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -269084555, now seen corresponding path program 2 times [2024-09-13 03:43:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 03:43:36,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454168065] [2024-09-13 03:43:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 03:43:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:36,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 03:43:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:36,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 03:43:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:36,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 03:43:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:36,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 03:43:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 03:43:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 03:43:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454168065] [2024-09-13 03:43:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454168065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 03:43:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357046249] [2024-09-13 03:43:36,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 03:43:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 03:43:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 03:43:36,594 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) [2024-09-13 03:43:36,596 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 03:43:36,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 03:43:36,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 03:43:36,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 03:43:36,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 03:43:36,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 03:43:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 03:43:36,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 03:43:37,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 03:43:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357046249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 03:43:37,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 03:43:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-09-13 03:43:37,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368517981] [2024-09-13 03:43:37,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 03:43:37,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 03:43:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 03:43:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 03:43:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2024-09-13 03:43:37,301 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 16 states have internal predecessors, (23), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 03:43:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:37,538 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-09-13 03:43:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 03:43:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 16 states have internal predecessors, (23), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 26 [2024-09-13 03:43:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:37,540 INFO L225 Difference]: With dead ends: 40 [2024-09-13 03:43:37,541 INFO L226 Difference]: Without dead ends: 35 [2024-09-13 03:43:37,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-09-13 03:43:37,542 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:37,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 03:43:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-13 03:43:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-09-13 03:43:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-13 03:43:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-09-13 03:43:37,556 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 26 [2024-09-13 03:43:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:37,556 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-09-13 03:43:37,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 16 states have internal predecessors, (23), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 03:43:37,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-09-13 03:43:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 03:43:37,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:37,558 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:37,577 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 03:43:37,758 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 [2024-09-13 03:43:37,758 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:37,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1287477190, now seen corresponding path program 1 times [2024-09-13 03:43:37,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 03:43:37,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044197135] [2024-09-13 03:43:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 03:43:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 03:43:37,781 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-09-13 03:43:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 03:43:37,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-09-13 03:43:37,806 INFO L326 BasicCegarLoop]: Counterexample is feasible [2024-09-13 03:43:37,807 INFO L785 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-13 03:43:37,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 03:43:37,811 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-09-13 03:43:37,831 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 03:43:37,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 03:43:37 BoogieIcfgContainer [2024-09-13 03:43:37,834 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 03:43:37,835 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-13 03:43:37,835 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-13 03:43:37,835 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-13 03:43:37,836 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:32" (3/4) ... [2024-09-13 03:43:37,837 INFO L142 WitnessPrinter]: No result that supports witness generation found [2024-09-13 03:43:37,838 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-13 03:43:37,839 INFO L158 Benchmark]: Toolchain (without parser) took 5798.83ms. Allocated memory was 146.8MB in the beginning and 218.1MB in the end (delta: 71.3MB). Free memory was 88.8MB in the beginning and 139.2MB in the end (delta: -50.4MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2024-09-13 03:43:37,839 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 03:43:37,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.29ms. Allocated memory is still 146.8MB. Free memory was 88.8MB in the beginning and 77.8MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 03:43:37,840 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.29ms. Allocated memory is still 146.8MB. Free memory was 77.8MB in the beginning and 76.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 03:43:37,840 INFO L158 Benchmark]: Boogie Preprocessor took 39.90ms. Allocated memory is still 146.8MB. Free memory was 76.6MB in the beginning and 75.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 03:43:37,840 INFO L158 Benchmark]: RCFGBuilder took 303.92ms. Allocated memory is still 146.8MB. Free memory was 75.1MB in the beginning and 61.9MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 03:43:37,841 INFO L158 Benchmark]: TraceAbstraction took 5208.12ms. Allocated memory was 146.8MB in the beginning and 218.1MB in the end (delta: 71.3MB). Free memory was 61.0MB in the beginning and 139.2MB in the end (delta: -78.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 03:43:37,841 INFO L158 Benchmark]: Witness Printer took 3.78ms. Allocated memory is still 218.1MB. Free memory is still 139.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 03:43:37,844 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.29ms. Allocated memory is still 146.8MB. Free memory was 88.8MB in the beginning and 77.8MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.29ms. Allocated memory is still 146.8MB. Free memory was 77.8MB in the beginning and 76.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.90ms. Allocated memory is still 146.8MB. Free memory was 76.6MB in the beginning and 75.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 303.92ms. Allocated memory is still 146.8MB. Free memory was 75.1MB in the beginning and 61.9MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5208.12ms. Allocated memory was 146.8MB in the beginning and 218.1MB in the end (delta: 71.3MB). Free memory was 61.0MB in the beginning and 139.2MB in the end (delta: -78.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.78ms. Allocated memory is still 218.1MB. Free memory is still 139.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 56. Possible FailurePath: [L54] unsigned int x = 5; [L54] unsigned int x = 5; VAL [x={6:0}] [L55] CALL func_to_recursive_line_13_to_14_0(&x) VAL [\old(x)={6:0}] [L40] COND TRUE __VERIFIER_nondet_int() [L43] EXPR \read(*x) [L43] *x += 8 [L45] CALL func_to_recursive_line_13_to_14_0(x) VAL [\old(x)={6:0}] [L40] COND FALSE !(__VERIFIER_nondet_int()) [L45] RET func_to_recursive_line_13_to_14_0(x) VAL [\old(x)={6:0}, x={6:0}] [L55] RET func_to_recursive_line_13_to_14_0(&x) VAL [x={6:0}] [L56] EXPR \read(x) [L56] EXPR x & 5 [L56] CALL __VERIFIER_assert((x & 5) == 5) VAL [\old(cond)=0] [L23] COND TRUE !cond VAL [\old(cond)=0] [L27] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 280 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 226 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 586 IncrementalHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 54 mSDtfsCounter, 586 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 141 ConstructedInterpolants, 4 QuantifiedInterpolants, 937 SizeOfPredicates, 10 NumberOfNonLiveVariables, 211 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 9/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-09-13 03:43:37,871 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-invariants/recursified_bin-suffix-5.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c4cbc544f6c6468ca141cfd9a471f76e948b2a9f8c6c56806d9220760159bde9 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 03:43:40,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 03:43:40,097 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-13 03:43:40,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 03:43:40,102 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 03:43:40,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 03:43:40,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 03:43:40,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 03:43:40,128 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 03:43:40,128 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 03:43:40,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 03:43:40,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 03:43:40,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 03:43:40,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 03:43:40,133 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 03:43:40,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 03:43:40,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 03:43:40,134 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 03:43:40,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 03:43:40,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 03:43:40,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 03:43:40,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 03:43:40,140 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 03:43:40,140 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-13 03:43:40,140 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-13 03:43:40,140 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 03:43:40,140 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-13 03:43:40,141 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 03:43:40,141 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 03:43:40,141 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 03:43:40,141 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 03:43:40,142 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 03:43:40,142 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 03:43:40,142 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 03:43:40,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 03:43:40,142 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 03:43:40,143 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 03:43:40,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 03:43:40,146 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-13 03:43:40,146 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-13 03:43:40,147 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 03:43:40,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 03:43:40,147 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 03:43:40,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 03:43:40,148 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-13 03:43:40,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4cbc544f6c6468ca141cfd9a471f76e948b2a9f8c6c56806d9220760159bde9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 03:43:40,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 03:43:40,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 03:43:40,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 03:43:40,446 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 03:43:40,447 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 03:43:40,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-invariants/recursified_bin-suffix-5.c [2024-09-13 03:43:41,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 03:43:42,154 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 03:43:42,155 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_bin-suffix-5.c [2024-09-13 03:43:42,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/70da0e739/0e3253df142b4f9493acdefa57b820d3/FLAGf6c4a9c1e [2024-09-13 03:43:42,180 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/70da0e739/0e3253df142b4f9493acdefa57b820d3 [2024-09-13 03:43:42,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 03:43:42,185 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 03:43:42,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 03:43:42,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 03:43:42,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 03:43:42,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c1b622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42, skipping insertion in model container [2024-09-13 03:43:42,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 03:43:42,367 WARN L247 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-invariants/recursified_bin-suffix-5.c[986,999] [2024-09-13 03:43:42,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 03:43:42,399 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 03:43:42,411 WARN L247 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-invariants/recursified_bin-suffix-5.c[986,999] [2024-09-13 03:43:42,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 03:43:42,430 INFO L204 MainTranslator]: Completed translation [2024-09-13 03:43:42,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42 WrapperNode [2024-09-13 03:43:42,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 03:43:42,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 03:43:42,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 03:43:42,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 03:43:42,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,454 INFO L138 Inliner]: procedures = 18, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 03:43:42,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 03:43:42,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 03:43:42,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 03:43:42,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 03:43:42,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,467 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,488 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 1 writes are split as follows [0, 1]. [2024-09-13 03:43:42,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 03:43:42,508 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 03:43:42,508 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 03:43:42,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 03:43:42,509 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (1/1) ... [2024-09-13 03:43:42,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 03:43:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 03:43:42,540 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) [2024-09-13 03:43:42,547 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 [2024-09-13 03:43:42,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 03:43:42,593 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2024-09-13 03:43:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2024-09-13 03:43:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-13 03:43:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-09-13 03:43:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-09-13 03:43:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-09-13 03:43:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 03:43:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 03:43:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 03:43:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 03:43:42,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 03:43:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-09-13 03:43:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-09-13 03:43:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 03:43:42,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 03:43:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 03:43:42,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 03:43:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 03:43:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-09-13 03:43:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-09-13 03:43:42,691 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 03:43:42,694 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 03:43:42,861 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-13 03:43:42,864 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 03:43:42,900 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 03:43:42,901 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 03:43:42,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:42 BoogieIcfgContainer [2024-09-13 03:43:42,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 03:43:42,904 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 03:43:42,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 03:43:42,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 03:43:42,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 03:43:42" (1/3) ... [2024-09-13 03:43:42,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31067294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 03:43:42, skipping insertion in model container [2024-09-13 03:43:42,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 03:43:42" (2/3) ... [2024-09-13 03:43:42,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31067294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 03:43:42, skipping insertion in model container [2024-09-13 03:43:42,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:42" (3/3) ... [2024-09-13 03:43:42,912 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bin-suffix-5.c [2024-09-13 03:43:42,929 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 03:43:42,930 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 03:43:42,985 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 03:43:42,991 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;@f26e4c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 03:43:42,991 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 03:43:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 03:43:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 03:43:43,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:43,001 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:43,002 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:43,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1965475425, now seen corresponding path program 1 times [2024-09-13 03:43:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-13 03:43:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718152082] [2024-09-13 03:43:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:43,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-13 03:43:43,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-13 03:43:43,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-13 03:43:43,024 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-13 03:43:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:43,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 03:43:43,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 03:43:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 03:43:43,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 03:43:43,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-13 03:43:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718152082] [2024-09-13 03:43:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718152082] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 03:43:43,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 03:43:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-13 03:43:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964489013] [2024-09-13 03:43:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 03:43:43,276 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 03:43:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-13 03:43:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 03:43:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 03:43:43,306 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:43,532 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-09-13 03:43:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 03:43:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-13 03:43:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:43,543 INFO L225 Difference]: With dead ends: 41 [2024-09-13 03:43:43,543 INFO L226 Difference]: Without dead ends: 19 [2024-09-13 03:43:43,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-13 03:43:43,551 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:43,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 53 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 03:43:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-13 03:43:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-13 03:43:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 03:43:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-09-13 03:43:43,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2024-09-13 03:43:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:43,591 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-09-13 03:43:43,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 03:43:43,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-09-13 03:43:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 03:43:43,595 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 03:43:43,595 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 03:43:43,601 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-09-13 03:43:43,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-13 03:43:43,798 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 03:43:43,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 869435945, now seen corresponding path program 1 times [2024-09-13 03:43:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-13 03:43:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590160666] [2024-09-13 03:43:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 03:43:43,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-13 03:43:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-13 03:43:43,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-13 03:43:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-09-13 03:43:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 03:43:43,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 03:43:43,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 03:43:43,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 03:43:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 03:43:44,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 03:43:44,353 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 10 treesize of output 6 [2024-09-13 03:43:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 03:43:44,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-13 03:43:44,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590160666] [2024-09-13 03:43:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590160666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 03:43:44,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 03:43:44,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-09-13 03:43:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94831040] [2024-09-13 03:43:44,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 03:43:44,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 03:43:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-13 03:43:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 03:43:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-13 03:43:44,519 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 03:43:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 03:43:44,868 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2024-09-13 03:43:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 03:43:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 20 [2024-09-13 03:43:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 03:43:44,869 INFO L225 Difference]: With dead ends: 23 [2024-09-13 03:43:44,869 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 03:43:44,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-09-13 03:43:44,871 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 03:43:44,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 03:43:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 03:43:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 03:43:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 03:43:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 03:43:44,877 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2024-09-13 03:43:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 03:43:44,877 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 03:43:44,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 03:43:44,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 03:43:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 03:43:44,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 03:43:44,881 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-13 03:43:44,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-09-13 03:43:45,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-13 03:43:45,087 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1] [2024-09-13 03:43:45,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-13 03:43:45,308 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 03:43:45,323 WARN L945 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-09-13 03:43:45,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 03:43:45 BoogieIcfgContainer [2024-09-13 03:43:45,327 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 03:43:45,328 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-13 03:43:45,329 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-13 03:43:45,329 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-13 03:43:45,329 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 03:43:42" (3/4) ... [2024-09-13 03:43:45,331 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-13 03:43:45,334 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-13 03:43:45,335 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_13_to_14_0 [2024-09-13 03:43:45,335 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-13 03:43:45,335 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-13 03:43:45,338 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-13 03:43:45,340 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-13 03:43:45,340 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-13 03:43:45,341 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-13 03:43:45,415 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-13 03:43:45,415 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-13 03:43:45,415 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-13 03:43:45,416 INFO L158 Benchmark]: Toolchain (without parser) took 3231.11ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 27.0MB in the beginning and 38.9MB in the end (delta: -11.9MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,416 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 41.9MB. Free memory was 18.2MB in the beginning and 18.1MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 03:43:45,416 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.30ms. Allocated memory is still 56.6MB. Free memory was 26.8MB in the beginning and 29.7MB in the end (delta: -2.9MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.10ms. Allocated memory is still 56.6MB. Free memory was 29.7MB in the beginning and 28.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,417 INFO L158 Benchmark]: Boogie Preprocessor took 51.94ms. Allocated memory is still 56.6MB. Free memory was 28.6MB in the beginning and 26.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,417 INFO L158 Benchmark]: RCFGBuilder took 394.24ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 26.7MB in the beginning and 41.3MB in the end (delta: -14.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,418 INFO L158 Benchmark]: TraceAbstraction took 2423.44ms. Allocated memory is still 69.2MB. Free memory was 40.7MB in the beginning and 43.1MB in the end (delta: -2.4MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,418 INFO L158 Benchmark]: Witness Printer took 86.88ms. Allocated memory is still 69.2MB. Free memory was 43.1MB in the beginning and 38.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-13 03:43:45,420 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 41.9MB. Free memory was 18.2MB in the beginning and 18.1MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.30ms. Allocated memory is still 56.6MB. Free memory was 26.8MB in the beginning and 29.7MB in the end (delta: -2.9MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.10ms. Allocated memory is still 56.6MB. Free memory was 29.7MB in the beginning and 28.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.94ms. Allocated memory is still 56.6MB. Free memory was 28.6MB in the beginning and 26.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.24ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 26.7MB in the beginning and 41.3MB in the end (delta: -14.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2423.44ms. Allocated memory is still 69.2MB. Free memory was 40.7MB in the beginning and 43.1MB in the end (delta: -2.4MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. * Witness Printer took 86.88ms. Allocated memory is still 69.2MB. Free memory was 43.1MB in the beginning and 38.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 27]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 108 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 86 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 170 IncrementalHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 22 mSDtfsCounter, 170 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 52 ConstructedInterpolants, 4 QuantifiedInterpolants, 364 SizeOfPredicates, 8 NumberOfNonLiveVariables, 108 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 21]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 == \old(cond)) Ensures: (1 == \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-13 03:43:45,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE