./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/verifythis/elimination_max_rec.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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:52:04,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:52:04,197 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:52:04,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:52:04,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:52:04,228 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:52:04,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:52:04,229 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:52:04,230 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:52:04,230 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:52:04,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:52:04,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:52:04,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:52:04,233 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:52:04,234 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:52:04,234 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:52:04,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:52:04,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:52:04,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:52:04,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:52:04,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:52:04,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:52:04,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:52:04,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:52:04,239 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:52:04,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:52:04,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:52:04,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:52:04,240 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:52:04,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:52:04,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:52:04,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:52:04,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:52:04,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:52:04,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:52:04,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:52:04,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:52:04,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:52:04,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:52:04,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:52:04,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:52:04,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:52:04,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:52:04,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:52:04,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:52:04,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:52:04,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:52:04,488 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:52:04,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-20 19:52:05,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:52:06,002 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:52:06,003 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-20 19:52:06,008 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/029734d0d/00a88926459e40fb9d5690bc9f42a676/FLAG0e5918c4a [2024-09-20 19:52:06,018 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/029734d0d/00a88926459e40fb9d5690bc9f42a676 [2024-09-20 19:52:06,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:52:06,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:52:06,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:52:06,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:52:06,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:52:06,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,027 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bae75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06, skipping insertion in model container [2024-09-20 19:52:06,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,040 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:52:06,135 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-20 19:52:06,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:52:06,186 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:52:06,199 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-20 19:52:06,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:52:06,246 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:52:06,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06 WrapperNode [2024-09-20 19:52:06,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:52:06,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:52:06,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:52:06,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:52:06,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,267 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:52:06,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:52:06,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:52:06,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:52:06,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:52:06,279 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,281 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,292 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-20 19:52:06,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:52:06,301 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:52:06,301 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:52:06,301 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:52:06,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (1/1) ... [2024-09-20 19:52:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:52:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:06,328 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) [2024-09-20 19:52:06,333 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 [2024-09-20 19:52:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:52:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:52:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:52:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:52:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:52:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:52:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:52:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-20 19:52:06,371 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-20 19:52:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:52:06,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:52:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-20 19:52:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:52:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:52:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:52:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:52:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-20 19:52:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-20 19:52:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:52:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:52:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:52:06,447 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:52:06,449 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:52:06,590 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 19:52:06,590 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:52:06,605 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:52:06,605 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:52:06,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:52:06 BoogieIcfgContainer [2024-09-20 19:52:06,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:52:06,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:52:06,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:52:06,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:52:06,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:52:06" (1/3) ... [2024-09-20 19:52:06,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72860b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:52:06, skipping insertion in model container [2024-09-20 19:52:06,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:06" (2/3) ... [2024-09-20 19:52:06,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72860b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:52:06, skipping insertion in model container [2024-09-20 19:52:06,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:52:06" (3/3) ... [2024-09-20 19:52:06,612 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2024-09-20 19:52:06,623 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:52:06,624 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:52:06,679 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:52:06,685 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;@b02ac58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:52:06,685 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:52:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:52:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:52:06,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:06,695 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:06,696 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:06,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2039448540, now seen corresponding path program 1 times [2024-09-20 19:52:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:06,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255746232] [2024-09-20 19:52:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:52:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:06,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:06,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255746232] [2024-09-20 19:52:06,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255746232] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:06,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:52:06,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 19:52:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480698743] [2024-09-20 19:52:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:06,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 19:52:06,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 19:52:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:52:06,903 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:06,976 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-20 19:52:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 19:52:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 19:52:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:06,986 INFO L225 Difference]: With dead ends: 72 [2024-09-20 19:52:06,986 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:52:06,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:52:06,991 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:06,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:52:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 19:52:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:52:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-20 19:52:07,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2024-09-20 19:52:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:07,033 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-20 19:52:07,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:07,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-20 19:52:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:52:07,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:07,035 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:07,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:52:07,035 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:07,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash 975655078, now seen corresponding path program 1 times [2024-09-20 19:52:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:07,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455299705] [2024-09-20 19:52:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:52:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455299705] [2024-09-20 19:52:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455299705] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:07,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:52:07,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:52:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874552099] [2024-09-20 19:52:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:07,329 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:52:07,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:52:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:52:07,331 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:52:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:07,606 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2024-09-20 19:52:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:52:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-20 19:52:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:07,609 INFO L225 Difference]: With dead ends: 62 [2024-09-20 19:52:07,609 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:52:07,609 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:52:07,610 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:07,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 46 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:52:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:52:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2024-09-20 19:52:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:52:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-09-20 19:52:07,622 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 22 [2024-09-20 19:52:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:07,623 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-09-20 19:52:07,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:52:07,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-09-20 19:52:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:52:07,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:07,625 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:07,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:52:07,625 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:07,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash -599674086, now seen corresponding path program 1 times [2024-09-20 19:52:07,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:07,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337293621] [2024-09-20 19:52:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:07,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:52:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:52:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:07,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337293621] [2024-09-20 19:52:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337293621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359996997] [2024-09-20 19:52:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:07,924 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) [2024-09-20 19:52:07,928 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:52:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 19:52:07,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:08,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:52:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359996997] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:08,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:52:08,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 19:52:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725141303] [2024-09-20 19:52:08,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:08,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:52:08,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:52:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:52:08,112 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:52:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:08,247 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-09-20 19:52:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:52:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-09-20 19:52:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:08,248 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:52:08,249 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 19:52:08,249 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:52:08,250 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 39 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:08,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 187 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 19:52:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2024-09-20 19:52:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:52:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-09-20 19:52:08,271 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2024-09-20 19:52:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:08,272 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-09-20 19:52:08,272 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:52:08,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-09-20 19:52:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 19:52:08,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:08,273 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:08,287 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:52:08,477 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 [2024-09-20 19:52:08,478 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:08,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1182090583, now seen corresponding path program 1 times [2024-09-20 19:52:08,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:08,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556133423] [2024-09-20 19:52:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:52:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:52:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 19:52:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:52:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:52:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556133423] [2024-09-20 19:52:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556133423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579084980] [2024-09-20 19:52:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:08,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:08,686 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) [2024-09-20 19:52:08,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:52:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:52:08,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:08,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-20 19:52:08,987 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 29 treesize of output 23 [2024-09-20 19:52:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:09,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:13,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579084980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:13,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:52:13,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2024-09-20 19:52:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104912628] [2024-09-20 19:52:13,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:13,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:52:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:52:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:52:13,148 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:52:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:13,511 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-09-20 19:52:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:52:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 41 [2024-09-20 19:52:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:13,512 INFO L225 Difference]: With dead ends: 45 [2024-09-20 19:52:13,512 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:52:13,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2024-09-20 19:52:13,513 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:13,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 56 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:52:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:52:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:52:13,514 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) [2024-09-20 19:52:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:52:13,514 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2024-09-20 19:52:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:13,517 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:52:13,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:52:13,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:52:13,517 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:52:13,519 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:52:13,533 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:52:13,720 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 [2024-09-20 19:52:13,726 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-09-20 19:52:13,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:52:14,573 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:52:14,584 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:401) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:126) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:109) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.BacktranslationService.translateExpressionToString(BacktranslationService.java:92) at de.uni_freiburg.informatik.ultimate.core.lib.results.ProcedureContractResult.translateTerm(ProcedureContractResult.java:69) at de.uni_freiburg.informatik.ultimate.core.lib.results.ProcedureContractResult.(ProcedureContractResult.java:59) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.FloydHoareUtils.createProcedureContractResults(FloydHoareUtils.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-09-20 19:52:14,588 INFO L158 Benchmark]: Toolchain (without parser) took 8568.01ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 74.6MB in the beginning and 100.9MB in the end (delta: -26.3MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. [2024-09-20 19:52:14,589 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:52:14,589 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.62ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 74.3MB in the beginning and 199.3MB in the end (delta: -125.0MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2024-09-20 19:52:14,589 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.29ms. Allocated memory is still 226.5MB. Free memory was 199.3MB in the beginning and 198.4MB in the end (delta: 984.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:52:14,589 INFO L158 Benchmark]: Boogie Preprocessor took 30.43ms. Allocated memory is still 226.5MB. Free memory was 198.4MB in the beginning and 196.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:52:14,589 INFO L158 Benchmark]: RCFGBuilder took 305.14ms. Allocated memory is still 226.5MB. Free memory was 196.3MB in the beginning and 180.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-20 19:52:14,590 INFO L158 Benchmark]: TraceAbstraction took 7980.76ms. Allocated memory is still 226.5MB. Free memory was 180.5MB in the beginning and 100.9MB in the end (delta: 79.6MB). Peak memory consumption was 78.6MB. Max. memory is 16.1GB. [2024-09-20 19:52:14,590 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.62ms. Allocated memory was 146.8MB in the beginning and 226.5MB in the end (delta: 79.7MB). Free memory was 74.3MB in the beginning and 199.3MB in the end (delta: -125.0MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.29ms. Allocated memory is still 226.5MB. Free memory was 199.3MB in the beginning and 198.4MB in the end (delta: 984.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.43ms. Allocated memory is still 226.5MB. Free memory was 198.4MB in the beginning and 196.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 305.14ms. Allocated memory is still 226.5MB. Free memory was 196.3MB in the beginning and 180.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7980.76ms. Allocated memory is still 226.5MB. Free memory was 180.5MB in the beginning and 100.9MB in the end (delta: 79.6MB). Peak memory consumption was 78.6MB. 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 - PositiveResult [Line: 11]: 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 7 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 187 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 176 mSDsluCounter, 305 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 235 mSDsCounter, 88 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 727 IncrementalHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 88 mSolverCounterUnsat, 70 mSDtfsCounter, 727 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=2, InterpolantAutomatonStates: 32, 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, 36 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 184 ConstructedInterpolants, 13 QuantifiedInterpolants, 680 SizeOfPredicates, 17 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 17/26 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 - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2024-09-20 19:52:14,611 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 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/verifythis/elimination_max_rec.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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:52:16,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:52:16,439 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-20 19:52:16,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:52:16,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:52:16,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:52:16,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:52:16,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:52:16,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:52:16,475 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:52:16,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:52:16,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:52:16,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:52:16,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:52:16,476 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:52:16,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:52:16,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:52:16,479 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:52:16,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:52:16,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:52:16,480 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:52:16,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:52:16,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:52:16,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:52:16,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:52:16,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:52:16,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:52:16,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:52:16,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:52:16,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:52:16,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:52:16,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:52:16,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:52:16,483 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-20 19:52:16,483 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-20 19:52:16,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:52:16,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:52:16,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:52:16,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:52:16,488 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-20 19:52:16,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:52:16,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:52:16,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:52:16,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:52:16,733 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:52:16,737 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:52:16,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-20 19:52:18,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:52:18,250 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:52:18,251 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-20 19:52:18,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2a5f6eeb8/93cf83a9dc80457eb6ad06cdc54cc0b7/FLAG4b4df175e [2024-09-20 19:52:18,269 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2a5f6eeb8/93cf83a9dc80457eb6ad06cdc54cc0b7 [2024-09-20 19:52:18,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:52:18,272 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:52:18,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:52:18,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:52:18,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:52:18,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1510dda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18, skipping insertion in model container [2024-09-20 19:52:18,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,296 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:52:18,430 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-20 19:52:18,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:52:18,458 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:52:18,468 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-20 19:52:18,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:52:18,487 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:52:18,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18 WrapperNode [2024-09-20 19:52:18,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:52:18,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:52:18,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:52:18,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:52:18,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,508 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:52:18,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:52:18,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:52:18,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:52:18,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:52:18,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,535 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-20 19:52:18,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:52:18,550 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:52:18,550 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:52:18,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:52:18,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (1/1) ... [2024-09-20 19:52:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:52:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:18,575 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) [2024-09-20 19:52:18,581 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 [2024-09-20 19:52:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:52:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-20 19:52:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-09-20 19:52:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:52:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:52:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:52:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:52:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-20 19:52:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-20 19:52:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:52:18,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:52:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-20 19:52:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-09-20 19:52:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-09-20 19:52:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:52:18,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:52:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-20 19:52:18,620 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-20 19:52:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:52:18,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:52:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:52:18,699 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:52:18,700 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:52:18,873 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 19:52:18,874 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:52:18,900 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:52:18,900 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:52:18,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:52:18 BoogieIcfgContainer [2024-09-20 19:52:18,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:52:18,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:52:18,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:52:18,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:52:18,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:52:18" (1/3) ... [2024-09-20 19:52:18,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c43092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:52:18, skipping insertion in model container [2024-09-20 19:52:18,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:52:18" (2/3) ... [2024-09-20 19:52:18,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c43092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:52:18, skipping insertion in model container [2024-09-20 19:52:18,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:52:18" (3/3) ... [2024-09-20 19:52:18,911 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2024-09-20 19:52:18,927 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:52:18,927 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:52:19,002 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:52:19,018 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;@337350ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:52:19,019 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:52:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:52:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:52:19,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:19,040 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:19,040 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:19,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2039448540, now seen corresponding path program 1 times [2024-09-20 19:52:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-20 19:52:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213460121] [2024-09-20 19:52:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:19,057 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 [2024-09-20 19:52:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-20 19:52:19,059 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) [2024-09-20 19:52:19,059 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 [2024-09-20 19:52:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-20 19:52:19,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:19,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:52:19,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-20 19:52:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213460121] [2024-09-20 19:52:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213460121] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:19,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:52:19,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:52:19,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7602042] [2024-09-20 19:52:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:19,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:52:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-20 19:52:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:52:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:52:19,224 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:19,257 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-20 19:52:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:52:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 19:52:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:19,269 INFO L225 Difference]: With dead ends: 72 [2024-09-20 19:52:19,270 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:52:19,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:52:19,276 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:19,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:52:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:52:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 19:52:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:52:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-20 19:52:19,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2024-09-20 19:52:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:19,311 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-20 19:52:19,311 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:19,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-20 19:52:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:52:19,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:19,315 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:19,320 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 [2024-09-20 19:52:19,515 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 [2024-09-20 19:52:19,515 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:19,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 975655078, now seen corresponding path program 1 times [2024-09-20 19:52:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-20 19:52:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957028087] [2024-09-20 19:52:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:19,517 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 [2024-09-20 19:52:19,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-20 19:52:19,520 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) [2024-09-20 19:52:19,523 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 [2024-09-20 19:52:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 19:52:19,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:19,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:52:19,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-20 19:52:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957028087] [2024-09-20 19:52:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957028087] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:19,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:52:19,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-20 19:52:19,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143506232] [2024-09-20 19:52:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:19,893 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:52:19,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-20 19:52:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:52:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:52:19,895 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:20,139 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-09-20 19:52:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:52:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 19:52:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:20,141 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:52:20,141 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 19:52:20,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:52:20,142 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:20,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 179 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 19:52:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 19:52:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:52:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-09-20 19:52:20,153 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 22 [2024-09-20 19:52:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:20,154 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-09-20 19:52:20,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:52:20,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-09-20 19:52:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:52:20,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:20,155 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:20,160 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 [2024-09-20 19:52:20,358 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 [2024-09-20 19:52:20,359 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:20,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash -599674086, now seen corresponding path program 1 times [2024-09-20 19:52:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-20 19:52:20,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453396773] [2024-09-20 19:52:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:20,361 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 [2024-09-20 19:52:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-20 19:52:20,363 INFO L229 MonitoredProcess]: Starting monitored process 4 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) [2024-09-20 19:52:20,364 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 (4)] Waiting until timeout for monitored process [2024-09-20 19:52:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 19:52:20,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:20,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:21,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-20 19:52:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453396773] [2024-09-20 19:52:21,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453396773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:21,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:52:21,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2024-09-20 19:52:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756003374] [2024-09-20 19:52:21,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:21,013 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:52:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-20 19:52:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:52:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:52:21,014 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:52:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:21,980 INFO L93 Difference]: Finished difference Result 108 states and 140 transitions. [2024-09-20 19:52:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 19:52:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2024-09-20 19:52:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:21,984 INFO L225 Difference]: With dead ends: 108 [2024-09-20 19:52:21,984 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 19:52:21,985 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:52:21,986 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:21,986 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 523 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:52:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 19:52:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2024-09-20 19:52:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 24 states have call successors, (24), 11 states have call predecessors, (24), 9 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 19:52:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2024-09-20 19:52:22,007 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 32 [2024-09-20 19:52:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:22,007 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2024-09-20 19:52:22,007 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:52:22,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2024-09-20 19:52:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 19:52:22,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:22,009 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:22,015 INFO L540 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 (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:22,211 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /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 [2024-09-20 19:52:22,212 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1182090583, now seen corresponding path program 1 times [2024-09-20 19:52:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-20 19:52:22,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498572816] [2024-09-20 19:52:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:22,213 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 [2024-09-20 19:52:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-20 19:52:22,216 INFO L229 MonitoredProcess]: Starting monitored process 5 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) [2024-09-20 19:52:22,217 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 (5)] Waiting until timeout for monitored process [2024-09-20 19:52:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:22,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:52:22,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:27,637 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-20 19:52:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-20 19:52:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 19:52:27,790 INFO L349 Elim1Store]: treesize reduction 96, result has 47.3 percent of original size [2024-09-20 19:52:27,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 56 treesize of output 101 [2024-09-20 19:52:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:52:27,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:28,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-20 19:52:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498572816] [2024-09-20 19:52:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498572816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467476740] [2024-09-20 19:52:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-09-20 19:52:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/cvc4 [2024-09-20 19:52:28,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-09-20 19:52:28,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-09-20 19:52:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:52:28,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:28,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-20 19:53:06,080 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_3) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-20 19:53:14,599 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_4) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-20 19:53:19,968 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_5) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-20 19:53:24,106 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 29 treesize of output 23 [2024-09-20 19:53:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-09-20 19:53:24,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:53:52,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467476740] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:52,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:53:52,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 33 [2024-09-20 19:53:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311520337] [2024-09-20 19:53:52,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:53:52,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 19:53:52,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-20 19:53:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 19:53:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1078, Unknown=15, NotChecked=204, Total=1406 [2024-09-20 19:53:52,692 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 10 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-20 19:53:56,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:54:00,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:54:04,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:54:06,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:54:13,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:56:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:19,656 INFO L93 Difference]: Finished difference Result 145 states and 177 transitions. [2024-09-20 19:56:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 19:56:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 10 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 41 [2024-09-20 19:56:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:19,658 INFO L225 Difference]: With dead ends: 145 [2024-09-20 19:56:19,658 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 19:56:19,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 217.9s TimeCoverageRelationStatistics Valid=357, Invalid=2702, Unknown=33, NotChecked=330, Total=3422 [2024-09-20 19:56:19,660 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 44 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:19,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 419 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 560 Invalid, 3 Unknown, 179 Unchecked, 18.5s Time] [2024-09-20 19:56:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 19:56:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-20 19:56:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 12 states have call successors, (12), 11 states have call predecessors, (12), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:56:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-20 19:56:19,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2024-09-20 19:56:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:19,676 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-20 19:56:19,677 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 10 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-20 19:56:19,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-20 19:56:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 19:56:19,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:19,678 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:19,686 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 (5)] Ended with exit code 0 [2024-09-20 19:56:19,881 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-09-20 19:56:20,081 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /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=3,6 /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt [2024-09-20 19:56:20,081 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:20,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -837710144, now seen corresponding path program 1 times [2024-09-20 19:56:20,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-20 19:56:20,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925625949] [2024-09-20 19:56:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:20,082 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 [2024-09-20 19:56:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-20 19:56:20,089 INFO L229 MonitoredProcess]: Starting monitored process 7 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) [2024-09-20 19:56:20,090 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 (7)] Waiting until timeout for monitored process [2024-09-20 19:56:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:20,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 19:56:20,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:56:21,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:56:23,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-20 19:56:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925625949] [2024-09-20 19:56:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925625949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:56:23,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:56:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2024-09-20 19:56:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365576050] [2024-09-20 19:56:23,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:56:23,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 19:56:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-20 19:56:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 19:56:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:56:23,737 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 12 states have call successors, (21), 10 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 19:56:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:29,938 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-09-20 19:56:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 19:56:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 12 states have call successors, (21), 10 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 52 [2024-09-20 19:56:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:29,940 INFO L225 Difference]: With dead ends: 85 [2024-09-20 19:56:29,940 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:56:29,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=610, Invalid=2582, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 19:56:29,943 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:29,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 278 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 19:56:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:56:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:56:29,947 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) [2024-09-20 19:56:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:56:29,947 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2024-09-20 19:56:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:29,948 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:56:29,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 12 states have call successors, (21), 10 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-20 19:56:29,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:56:29,948 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:56:29,950 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:56:29,958 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 (7)] Ended with exit code 0 [2024-09-20 19:56:30,151 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /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 [2024-09-20 19:56:30,154 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-09-20 19:56:30,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:56:42,064 WARN L293 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 129 DAG size of output: 15 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)