./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:30:10,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:30:10,228 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:30:10,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:30:10,235 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:30:10,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:30:10,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:30:10,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:30:10,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:30:10,270 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:30:10,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:30:10,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:30:10,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:30:10,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:30:10,273 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:30:10,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:30:10,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:30:10,274 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:30:10,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:30:10,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:30:10,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:30:10,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:30:10,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:30:10,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:30:10,278 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:30:10,278 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:30:10,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:30:10,279 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:30:10,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:30:10,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:30:10,280 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:30:10,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:30:10,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:10,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:30:10,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:30:10,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:30:10,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:30:10,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:30:10,282 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:30:10,282 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:30:10,282 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:30:10,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:30:10,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:30:10,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:30:10,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:30:10,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:30:10,558 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:30:10,559 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:30:10,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2024-09-21 12:30:11,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:30:12,175 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:30:12,175 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2024-09-21 12:30:12,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f1cd6e530/d02be19a68364fcf930671758ad14a22/FLAG9cd33575e [2024-09-21 12:30:12,545 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f1cd6e530/d02be19a68364fcf930671758ad14a22 [2024-09-21 12:30:12,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:30:12,548 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:30:12,550 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:12,551 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:30:12,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:30:12,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769120bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12, skipping insertion in model container [2024-09-21 12:30:12,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,578 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:30:12,727 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_onepoint.c[502,515] [2024-09-21 12:30:12,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:12,770 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:30:12,782 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2024-09-21 12:30:12,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:12,819 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:30:12,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12 WrapperNode [2024-09-21 12:30:12,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:12,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:12,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:30:12,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:30:12,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,849 INFO L138 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:30:12,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:12,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:30:12,850 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:30:12,850 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:30:12,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,873 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-09-21 12:30:12,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:30:12,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:30:12,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:30:12,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:30:12,890 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (1/1) ... [2024-09-21 12:30:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:12,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:30:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:30:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:30:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:30:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:30:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:30:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:30:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:30:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:30:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-21 12:30:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-21 12:30:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:30:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:30:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-21 12:30:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:30:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:30:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:30:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:30:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-21 12:30:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-21 12:30:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:30:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:30:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:30:13,072 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:30:13,074 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:30:13,337 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-09-21 12:30:13,338 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:30:13,359 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:30:13,359 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:30:13,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:13 BoogieIcfgContainer [2024-09-21 12:30:13,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:30:13,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:30:13,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:30:13,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:30:13,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:30:12" (1/3) ... [2024-09-21 12:30:13,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5e355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:13, skipping insertion in model container [2024-09-21 12:30:13,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:12" (2/3) ... [2024-09-21 12:30:13,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5e355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:13, skipping insertion in model container [2024-09-21 12:30:13,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:13" (3/3) ... [2024-09-21 12:30:13,368 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2024-09-21 12:30:13,384 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:30:13,385 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:30:13,456 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:30:13,464 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;@79cf3014, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:30:13,464 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:30:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:30:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:30:13,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:13,477 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:13,478 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:13,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1437097425, now seen corresponding path program 1 times [2024-09-21 12:30:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520704619] [2024-09-21 12:30:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:13,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:13,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:13,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:13,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520704619] [2024-09-21 12:30:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520704619] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:13,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:13,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 12:30:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762937319] [2024-09-21 12:30:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:13,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 12:30:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 12:30:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:30:13,745 INFO L87 Difference]: Start difference. First operand has 42 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:30:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:13,868 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-21 12:30:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 12:30:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-21 12:30:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:13,886 INFO L225 Difference]: With dead ends: 78 [2024-09-21 12:30:13,886 INFO L226 Difference]: Without dead ends: 38 [2024-09-21 12:30:13,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:30:13,897 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:13,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-21 12:30:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-21 12:30:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-21 12:30:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-21 12:30:13,960 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2024-09-21 12:30:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:13,960 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-21 12:30:13,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:30:13,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-21 12:30:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:30:13,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:13,967 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:13,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:30:13,967 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:13,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash 579935573, now seen corresponding path program 1 times [2024-09-21 12:30:13,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:13,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86335368] [2024-09-21 12:30:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:13,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86335368] [2024-09-21 12:30:14,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86335368] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:14,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:14,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-21 12:30:14,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17371958] [2024-09-21 12:30:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:14,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 12:30:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 12:30:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-21 12:30:14,313 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-21 12:30:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:14,620 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-09-21 12:30:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:30:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2024-09-21 12:30:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:14,623 INFO L225 Difference]: With dead ends: 62 [2024-09-21 12:30:14,623 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:30:14,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:30:14,627 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:14,628 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 65 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:30:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:30:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-09-21 12:30:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 12:30:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-09-21 12:30:14,651 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 28 [2024-09-21 12:30:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:14,655 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-09-21 12:30:14,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-21 12:30:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-09-21 12:30:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 12:30:14,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:14,658 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:14,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:30:14,659 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:14,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2135763327, now seen corresponding path program 1 times [2024-09-21 12:30:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:14,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276137084] [2024-09-21 12:30:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 12:30:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276137084] [2024-09-21 12:30:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276137084] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:14,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:14,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-21 12:30:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140685097] [2024-09-21 12:30:14,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:14,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:30:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:30:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-21 12:30:14,983 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:30:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:15,225 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-09-21 12:30:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:30:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-21 12:30:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:15,228 INFO L225 Difference]: With dead ends: 61 [2024-09-21 12:30:15,228 INFO L226 Difference]: Without dead ends: 53 [2024-09-21 12:30:15,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:30:15,232 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:15,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:30:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-21 12:30:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-21 12:30:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 12:30:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-09-21 12:30:15,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 31 [2024-09-21 12:30:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:15,251 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-09-21 12:30:15,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:30:15,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-09-21 12:30:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 12:30:15,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:15,253 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:15,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-21 12:30:15,253 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:15,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1566356218, now seen corresponding path program 1 times [2024-09-21 12:30:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616960688] [2024-09-21 12:30:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 12:30:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 12:30:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:30:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616960688] [2024-09-21 12:30:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616960688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:15,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416795020] [2024-09-21 12:30:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:15,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:15,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:15,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:30:15,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:30:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:15,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-21 12:30:15,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:30:15,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416795020] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:15,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:30:15,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-21 12:30:15,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033032974] [2024-09-21 12:30:15,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:15,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:30:15,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:30:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:30:15,893 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:30:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:16,117 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-21 12:30:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:30:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-09-21 12:30:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:16,120 INFO L225 Difference]: With dead ends: 68 [2024-09-21 12:30:16,120 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:30:16,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:30:16,121 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:16,123 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 201 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:30:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2024-09-21 12:30:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:30:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-21 12:30:16,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 43 [2024-09-21 12:30:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:16,137 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-21 12:30:16,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:30:16,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-21 12:30:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:30:16,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:16,139 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:16,156 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:30:16,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:16,340 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:16,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash -920124993, now seen corresponding path program 1 times [2024-09-21 12:30:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825044592] [2024-09-21 12:30:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:16,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 12:30:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 12:30:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 12:30:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:30:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825044592] [2024-09-21 12:30:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825044592] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671700413] [2024-09-21 12:30:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:16,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:30:16,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:30:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:16,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-21 12:30:16,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:16,659 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 [2024-09-21 12:30:16,795 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 [2024-09-21 12:30:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:16,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671700413] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:16,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:30:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2024-09-21 12:30:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116223390] [2024-09-21 12:30:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:16,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:30:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:30:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:30:16,840 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:30:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:16,950 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-09-21 12:30:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:30:16,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-21 12:30:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:16,960 INFO L225 Difference]: With dead ends: 72 [2024-09-21 12:30:16,960 INFO L226 Difference]: Without dead ends: 46 [2024-09-21 12:30:16,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:30:16,963 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:16,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-21 12:30:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-21 12:30:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:30:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-09-21 12:30:16,977 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 46 [2024-09-21 12:30:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:16,977 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-09-21 12:30:16,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:30:16,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-09-21 12:30:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:30:16,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:16,979 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:16,997 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:30:17,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:17,184 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:17,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1621189571, now seen corresponding path program 1 times [2024-09-21 12:30:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:17,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298600442] [2024-09-21 12:30:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:17,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:30:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:30:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 12:30:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 12:30:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 12:30:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:30:17,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:17,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298600442] [2024-09-21 12:30:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298600442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:17,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859703942] [2024-09-21 12:30:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:17,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:17,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:30:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:30:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:17,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-21 12:30:17,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:17,530 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 [2024-09-21 12:30:17,786 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 [2024-09-21 12:30:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:30:17,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:25,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859703942] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:25,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:30:25,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2024-09-21 12:30:25,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115900982] [2024-09-21 12:30:25,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:25,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:30:25,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:30:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-09-21 12:30:25,975 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-21 12:30:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:26,527 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2024-09-21 12:30:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 12:30:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2024-09-21 12:30:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:26,528 INFO L225 Difference]: With dead ends: 46 [2024-09-21 12:30:26,528 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:30:26,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:30:26,529 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:26,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 91 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:30:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:30:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:30:26,530 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) [2024-09-21 12:30:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:30:26,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2024-09-21 12:30:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:26,531 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:30:26,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.588235294117647) internal successors, (44), 15 states have internal predecessors, (44), 7 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-21 12:30:26,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:30:26,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:30:26,536 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:30:26,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:30:26,740 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 12:30:26,743 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-09-21 12:30:26,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:30:28,116 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:30:28,132 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.lib.translation.DefaultTranslator.translateExpressionWithContext(DefaultTranslator.java:165) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionWithContext(ModelTranslationContainer.java:101) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionWithContextToString(ModelTranslationContainer.java:91) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.BacktranslationService.translateExpressionWithContextToString(BacktranslationService.java:98) 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) [2024-09-21 12:30:28,136 INFO L158 Benchmark]: Toolchain (without parser) took 15587.55ms. Allocated memory was 167.8MB in the beginning and 207.6MB in the end (delta: 39.8MB). Free memory was 100.4MB in the beginning and 103.8MB in the end (delta: -3.4MB). Peak memory consumption was 86.2MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,136 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:30:28,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.49ms. Allocated memory is still 167.8MB. Free memory was 100.2MB in the beginning and 88.5MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,136 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.02ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 87.3MB in the end (delta: 954.4kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,137 INFO L158 Benchmark]: Boogie Preprocessor took 38.23ms. Allocated memory is still 167.8MB. Free memory was 87.3MB in the beginning and 85.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,137 INFO L158 Benchmark]: RCFGBuilder took 470.74ms. Allocated memory is still 167.8MB. Free memory was 85.3MB in the beginning and 131.0MB in the end (delta: -45.7MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,137 INFO L158 Benchmark]: TraceAbstraction took 14772.88ms. Allocated memory was 167.8MB in the beginning and 207.6MB in the end (delta: 39.8MB). Free memory was 130.2MB in the beginning and 103.8MB in the end (delta: 26.4MB). Peak memory consumption was 114.9MB. Max. memory is 16.1GB. [2024-09-21 12:30:28,138 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.49ms. Allocated memory is still 167.8MB. Free memory was 100.2MB in the beginning and 88.5MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.02ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 87.3MB in the end (delta: 954.4kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.23ms. Allocated memory is still 167.8MB. Free memory was 87.3MB in the beginning and 85.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.74ms. Allocated memory is still 167.8MB. Free memory was 85.3MB in the beginning and 131.0MB in the end (delta: -45.7MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. * TraceAbstraction took 14772.88ms. Allocated memory was 167.8MB in the beginning and 207.6MB in the end (delta: 39.8MB). Free memory was 130.2MB in the beginning and 103.8MB in the end (delta: 26.4MB). Peak memory consumption was 114.9MB. 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, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.3s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 209 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 189 mSDsluCounter, 575 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 451 mSDsCounter, 94 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1307 IncrementalHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 94 mSolverCounterUnsat, 124 mSDtfsCounter, 1307 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, InterpolantAutomatonStates: 55, 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, 6 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 348 ConstructedInterpolants, 22 QuantifiedInterpolants, 1064 SizeOfPredicates, 21 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 93/110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - 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. [2024-09-21 12:30:28,180 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_onepoint.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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:30:30,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:30:30,359 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-21 12:30:30,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:30:30,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:30:30,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:30:30,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:30:30,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:30:30,403 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:30:30,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:30:30,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:30:30,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:30:30,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:30:30,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:30:30,408 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:30:30,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:30:30,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:30:30,410 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:30:30,410 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:30:30,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:30:30,411 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:30:30,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:30:30,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:30:30,412 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-21 12:30:30,412 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-21 12:30:30,412 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:30:30,413 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-21 12:30:30,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:30:30,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:30:30,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:30:30,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:30:30,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:30:30,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:30:30,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:30:30,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:30,416 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:30:30,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:30:30,417 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:30:30,417 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-21 12:30:30,417 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-21 12:30:30,418 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:30:30,418 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:30:30,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:30:30,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:30:30,419 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-21 12:30:30,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:30:30,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:30:30,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:30:30,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:30:30,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:30:30,761 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:30:30,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2024-09-21 12:30:32,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:30:32,429 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:30:32,430 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2024-09-21 12:30:32,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/25e43ed99/8eebfab1c6324b1a98fe0a5669318bca/FLAG0d472a429 [2024-09-21 12:30:32,461 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/25e43ed99/8eebfab1c6324b1a98fe0a5669318bca [2024-09-21 12:30:32,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:30:32,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:30:32,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:32,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:30:32,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:30:32,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d64e434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32, skipping insertion in model container [2024-09-21 12:30:32,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,497 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:30:32,660 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_onepoint.c[502,515] [2024-09-21 12:30:32,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:32,710 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:30:32,724 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_onepoint.c[502,515] [2024-09-21 12:30:32,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:30:32,754 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:30:32,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32 WrapperNode [2024-09-21 12:30:32,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:30:32,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:32,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:30:32,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:30:32,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,777 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,787 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:30:32,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:30:32,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:30:32,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:30:32,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:30:32,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,802 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,820 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-09-21 12:30:32,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:30:32,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:30:32,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:30:32,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:30:32,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (1/1) ... [2024-09-21 12:30:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:30:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:32,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:30:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:30:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:30:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-21 12:30:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-09-21 12:30:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:30:32,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:30:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:30:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:30:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-21 12:30:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-21 12:30:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:30:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:30:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-21 12:30:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-09-21 12:30:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-09-21 12:30:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:30:32,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:30:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-21 12:30:32,923 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-21 12:30:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:30:32,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:30:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:30:33,007 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:30:33,010 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:30:33,337 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-09-21 12:30:33,338 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:30:33,377 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:30:33,377 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:30:33,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:33 BoogieIcfgContainer [2024-09-21 12:30:33,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:30:33,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:30:33,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:30:33,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:30:33,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:30:32" (1/3) ... [2024-09-21 12:30:33,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94132c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:33, skipping insertion in model container [2024-09-21 12:30:33,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:30:32" (2/3) ... [2024-09-21 12:30:33,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94132c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:30:33, skipping insertion in model container [2024-09-21 12:30:33,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:30:33" (3/3) ... [2024-09-21 12:30:33,389 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2024-09-21 12:30:33,408 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:30:33,409 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:30:33,474 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:30:33,481 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;@2a7fc6f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:30:33,482 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:30:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:30:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:30:33,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:33,493 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:33,493 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:33,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1437097425, now seen corresponding path program 1 times [2024-09-21 12:30:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:30:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366607265] [2024-09-21 12:30:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:33,513 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 [2024-09-21 12:30:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:30:33,516 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) [2024-09-21 12:30:33,518 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 [2024-09-21 12:30:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:33,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-21 12:30:33,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:30:33,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:33,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:30:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366607265] [2024-09-21 12:30:33,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366607265] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:33,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 12:30:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494366789] [2024-09-21 12:30:33,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:33,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 12:30:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:30:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 12:30:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:30:33,687 INFO L87 Difference]: Start difference. First operand has 42 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:30:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:33,730 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-21 12:30:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 12:30:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-21 12:30:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:33,743 INFO L225 Difference]: With dead ends: 78 [2024-09-21 12:30:33,743 INFO L226 Difference]: Without dead ends: 38 [2024-09-21 12:30:33,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:30:33,752 INFO L434 NwaCegarLoop]: 45 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, 45 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 [2024-09-21 12:30:33,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:30:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-21 12:30:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-21 12:30:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-21 12:30:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-21 12:30:33,802 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2024-09-21 12:30:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:33,803 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-21 12:30:33,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:30:33,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-21 12:30:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:30:33,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:33,811 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:33,815 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 [2024-09-21 12:30:34,011 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 [2024-09-21 12:30:34,012 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:34,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash 579935573, now seen corresponding path program 1 times [2024-09-21 12:30:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:30:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744763955] [2024-09-21 12:30:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:34,014 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 [2024-09-21 12:30:34,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:30:34,017 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) [2024-09-21 12:30:34,018 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 [2024-09-21 12:30:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 12:30:34,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:34,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:34,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:30:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744763955] [2024-09-21 12:30:34,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744763955] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:34,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-21 12:30:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312159130] [2024-09-21 12:30:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:34,486 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 12:30:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:30:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 12:30:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:30:34,498 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:30:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:34,871 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-09-21 12:30:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:30:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-21 12:30:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:34,873 INFO L225 Difference]: With dead ends: 56 [2024-09-21 12:30:34,873 INFO L226 Difference]: Without dead ends: 54 [2024-09-21 12:30:34,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:30:34,875 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:34,878 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 220 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:30:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-21 12:30:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-21 12:30:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 12:30:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-09-21 12:30:34,905 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2024-09-21 12:30:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:34,905 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-09-21 12:30:34,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:30:34,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-09-21 12:30:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 12:30:34,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:34,908 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:34,912 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 [2024-09-21 12:30:35,109 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 [2024-09-21 12:30:35,109 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:35,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2135763327, now seen corresponding path program 1 times [2024-09-21 12:30:35,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:30:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246814180] [2024-09-21 12:30:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:35,112 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 [2024-09-21 12:30:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:30:35,113 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) [2024-09-21 12:30:35,114 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 [2024-09-21 12:30:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:35,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 12:30:35,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:35,487 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-21 12:30:35,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:30:35,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-09-21 12:30:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:30:35,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:35,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:30:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246814180] [2024-09-21 12:30:35,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246814180] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:35,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:30:35,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-21 12:30:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628917057] [2024-09-21 12:30:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:35,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 12:30:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:30:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 12:30:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:30:35,579 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:30:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:35,896 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-09-21 12:30:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:30:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-09-21 12:30:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:35,899 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:30:35,899 INFO L226 Difference]: Without dead ends: 56 [2024-09-21 12:30:35,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:30:35,900 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:35,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 285 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:30:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-21 12:30:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-09-21 12:30:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 12:30:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-09-21 12:30:35,927 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 31 [2024-09-21 12:30:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:35,927 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-09-21 12:30:35,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-21 12:30:35,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-09-21 12:30:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 12:30:35,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:35,929 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:35,942 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 (4)] Ended with exit code 0 [2024-09-21 12:30:36,130 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 [2024-09-21 12:30:36,130 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 757009592, now seen corresponding path program 1 times [2024-09-21 12:30:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:30:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006395412] [2024-09-21 12:30:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:36,132 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 [2024-09-21 12:30:36,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:30:36,134 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) [2024-09-21 12:30:36,135 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 [2024-09-21 12:30:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:36,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-21 12:30:36,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:30:36,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:30:37,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:30:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006395412] [2024-09-21 12:30:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006395412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:37,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:30:37,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2024-09-21 12:30:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532635309] [2024-09-21 12:30:37,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:37,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 12:30:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:30:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 12:30:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-09-21 12:30:37,397 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 10 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-21 12:30:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:39,139 INFO L93 Difference]: Finished difference Result 108 states and 140 transitions. [2024-09-21 12:30:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:30:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 10 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 43 [2024-09-21 12:30:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:39,142 INFO L225 Difference]: With dead ends: 108 [2024-09-21 12:30:39,142 INFO L226 Difference]: Without dead ends: 106 [2024-09-21 12:30:39,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:30:39,144 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 80 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:39,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 441 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-21 12:30:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-21 12:30:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2024-09-21 12:30:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-21 12:30:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2024-09-21 12:30:39,171 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 43 [2024-09-21 12:30:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:39,172 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2024-09-21 12:30:39,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 10 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-21 12:30:39,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2024-09-21 12:30:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:30:39,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:39,174 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:39,179 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 [2024-09-21 12:30:39,377 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 [2024-09-21 12:30:39,378 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash -920124993, now seen corresponding path program 1 times [2024-09-21 12:30:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:30:39,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271202950] [2024-09-21 12:30:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:39,380 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 [2024-09-21 12:30:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:30:39,381 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2024-09-21 12:30:39,383 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 (6)] Waiting until timeout for monitored process [2024-09-21 12:30:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:39,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-21 12:30:39,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:40,391 INFO L349 Elim1Store]: treesize reduction 80, result has 41.6 percent of original size [2024-09-21 12:30:40,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 71 [2024-09-21 12:30:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:30:40,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:53,668 INFO L349 Elim1Store]: treesize reduction 15, result has 59.5 percent of original size [2024-09-21 12:30:53,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2024-09-21 12:30:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:30:54,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:30:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271202950] [2024-09-21 12:30:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271202950] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:54,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:30:54,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-09-21 12:30:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996414061] [2024-09-21 12:30:54,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:54,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-21 12:30:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:30:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-21 12:30:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=951, Unknown=3, NotChecked=0, Total=1056 [2024-09-21 12:30:54,658 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-21 12:31:02,622 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 [1] [2024-09-21 12:31:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:31:04,853 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2024-09-21 12:31:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-21 12:31:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 46 [2024-09-21 12:31:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:31:04,856 INFO L225 Difference]: With dead ends: 165 [2024-09-21 12:31:04,856 INFO L226 Difference]: Without dead ends: 163 [2024-09-21 12:31:04,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=258, Invalid=2495, Unknown=3, NotChecked=0, Total=2756 [2024-09-21 12:31:04,862 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:31:04,864 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 632 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 671 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-09-21 12:31:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-21 12:31:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 146. [2024-09-21 12:31:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 93 states have internal predecessors, (98), 40 states have call successors, (40), 18 states have call predecessors, (40), 20 states have return successors, (42), 34 states have call predecessors, (42), 37 states have call successors, (42) [2024-09-21 12:31:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2024-09-21 12:31:04,929 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 46 [2024-09-21 12:31:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:31:04,930 INFO L474 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2024-09-21 12:31:04,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-21 12:31:04,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2024-09-21 12:31:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 12:31:04,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:31:04,934 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:31:04,941 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 (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:31:05,136 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /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 [2024-09-21 12:31:05,137 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:31:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 986908330, now seen corresponding path program 1 times [2024-09-21 12:31:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 12:31:05,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824924716] [2024-09-21 12:31:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:31:05,138 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 [2024-09-21 12:31:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 12:31:05,139 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) [2024-09-21 12:31:05,140 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 [2024-09-21 12:31:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:05,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 12:31:05,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:31:05,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:31:05,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-09-21 12:31:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-21 12:31:05,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:31:06,450 INFO L349 Elim1Store]: treesize reduction 5, result has 94.6 percent of original size [2024-09-21 12:31:06,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 95 [2024-09-21 12:31:07,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 12:31:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824924716] [2024-09-21 12:31:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824924716] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:31:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [436207379] [2024-09-21 12:31:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:31:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-09-21 12:31:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/cvc4 [2024-09-21 12:31:07,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-09-21 12:31:07,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-09-21 12:31:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:07,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 12:31:07,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:31:07,420 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 [2024-09-21 12:31:11,591 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_2 (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int#1| v_main_~a~0.base_BEFORE_CALL_2))) is different from true [2024-09-21 12:32:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2024-09-21 12:32:45,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:33:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [436207379] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:33:21,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:33:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-21 12:33:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356197219] [2024-09-21 12:33:21,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:33:21,614 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:33:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 12:33:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:33:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=771, Unknown=25, NotChecked=56, Total=930 [2024-09-21 12:33:21,616 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand has 24 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (17), 6 states have call predecessors, (17), 9 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-21 12:33:41,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:33:46,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:33:50,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:33:54,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:06,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:10,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:14,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:18,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:22,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:26,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:34:30,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]