./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/string-1.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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/loops/string-1.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de --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-f1d7dc9-m [2024-09-20 11:56:42,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 11:56:42,716 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 11:56:42,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 11:56:42,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 11:56:42,741 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 11:56:42,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 11:56:42,742 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 11:56:42,742 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 11:56:42,743 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 11:56:42,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 11:56:42,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 11:56:42,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 11:56:42,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 11:56:42,744 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 11:56:42,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 11:56:42,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 11:56:42,745 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 11:56:42,745 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 11:56:42,745 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 11:56:42,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 11:56:42,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 11:56:42,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 11:56:42,746 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 11:56:42,747 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 11:56:42,747 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 11:56:42,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 11:56:42,747 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 11:56:42,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 11:56:42,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 11:56:42,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 11:56:42,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 11:56:42,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:42,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 11:56:42,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 11:56:42,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 11:56:42,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 11:56:42,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 11:56:42,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 11:56:42,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 11:56:42,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 11:56:42,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 11:56:42,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 11:56:42,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 11:56:42,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 11:56:42,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 11:56:42,982 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 11:56:42,982 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 11:56:42,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/string-1.i [2024-09-20 11:56:44,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 11:56:44,367 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 11:56:44,369 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/string-1.i [2024-09-20 11:56:44,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9edf9cbaa/6817b3204ae1431bba41093e0a8da27a/FLAG15381de6f [2024-09-20 11:56:44,778 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9edf9cbaa/6817b3204ae1431bba41093e0a8da27a [2024-09-20 11:56:44,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 11:56:44,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 11:56:44,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:44,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 11:56:44,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 11:56:44,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:44,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4f716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44, skipping insertion in model container [2024-09-20 11:56:44,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:44,801 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 11:56:44,915 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/loops/string-1.i[896,909] [2024-09-20 11:56:44,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:44,944 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 11:56:44,953 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/loops/string-1.i[896,909] [2024-09-20 11:56:44,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:44,981 INFO L204 MainTranslator]: Completed translation [2024-09-20 11:56:44,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44 WrapperNode [2024-09-20 11:56:44,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:44,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:44,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 11:56:44,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 11:56:44,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:44,998 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,004 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 11:56:45,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:45,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 11:56:45,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 11:56:45,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 11:56:45,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,014 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,024 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-09-20 11:56:45,025 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,025 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 11:56:45,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 11:56:45,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 11:56:45,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 11:56:45,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (1/1) ... [2024-09-20 11:56:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:45,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:45,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 11:56:45,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 11:56:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 11:56:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 11:56:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 11:56:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 11:56:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 11:56:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 11:56:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 11:56:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 11:56:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 11:56:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 11:56:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 11:56:45,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 11:56:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 11:56:45,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 11:56:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 11:56:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 11:56:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 11:56:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 11:56:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 11:56:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 11:56:45,168 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 11:56:45,170 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 11:56:45,312 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-09-20 11:56:45,312 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 11:56:45,328 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 11:56:45,328 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-20 11:56:45,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:45 BoogieIcfgContainer [2024-09-20 11:56:45,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 11:56:45,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 11:56:45,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 11:56:45,333 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 11:56:45,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:56:44" (1/3) ... [2024-09-20 11:56:45,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b80d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:45, skipping insertion in model container [2024-09-20 11:56:45,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:44" (2/3) ... [2024-09-20 11:56:45,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b80d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:45, skipping insertion in model container [2024-09-20 11:56:45,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:45" (3/3) ... [2024-09-20 11:56:45,335 INFO L112 eAbstractionObserver]: Analyzing ICFG string-1.i [2024-09-20 11:56:45,348 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 11:56:45,348 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 11:56:45,392 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 11:56:45,398 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;@19804e80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 11:56:45,398 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 11:56:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:56:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 11:56:45,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:45,407 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:45,407 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:45,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1254816598, now seen corresponding path program 1 times [2024-09-20 11:56:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690403148] [2024-09-20 11:56:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690403148] [2024-09-20 11:56:45,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690403148] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:45,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:45,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 11:56:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238227747] [2024-09-20 11:56:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:45,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 11:56:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 11:56:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:56:45,628 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:45,690 INFO L93 Difference]: Finished difference Result 62 states and 96 transitions. [2024-09-20 11:56:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 11:56:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-20 11:56:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:45,698 INFO L225 Difference]: With dead ends: 62 [2024-09-20 11:56:45,698 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 11:56:45,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:56:45,702 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:45,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:56:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 11:56:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-20 11:56:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-09-20 11:56:45,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2024-09-20 11:56:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:45,730 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-09-20 11:56:45,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:45,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-09-20 11:56:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 11:56:45,731 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:45,731 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:45,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 11:56:45,731 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:45,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash 178970737, now seen corresponding path program 1 times [2024-09-20 11:56:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822697274] [2024-09-20 11:56:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:45,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822697274] [2024-09-20 11:56:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822697274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230132965] [2024-09-20 11:56:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:45,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:45,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 11:56:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-20 11:56:45,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:45,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:45,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230132965] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:45,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:46,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-20 11:56:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580725583] [2024-09-20 11:56:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:46,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 11:56:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 11:56:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:46,002 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:46,071 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2024-09-20 11:56:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 11:56:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 11:56:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:46,073 INFO L225 Difference]: With dead ends: 61 [2024-09-20 11:56:46,073 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 11:56:46,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:46,075 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:46,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 11:56:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-09-20 11:56:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-09-20 11:56:46,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2024-09-20 11:56:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:46,084 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-09-20 11:56:46,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-09-20 11:56:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 11:56:46,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:46,086 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:46,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 11:56:46,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:46,288 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:46,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1867763806, now seen corresponding path program 2 times [2024-09-20 11:56:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:46,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795962703] [2024-09-20 11:56:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:56:46,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:46,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795962703] [2024-09-20 11:56:46,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795962703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:46,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470537266] [2024-09-20 11:56:46,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:46,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:46,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:46,457 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 11:56:46,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 11:56:46,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:46,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 11:56:46,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 11:56:46,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:56:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470537266] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:56:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-20 11:56:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744598306] [2024-09-20 11:56:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:46,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 11:56:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 11:56:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-09-20 11:56:46,612 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:46,668 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-09-20 11:56:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 11:56:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-20 11:56:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:46,670 INFO L225 Difference]: With dead ends: 49 [2024-09-20 11:56:46,671 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 11:56:46,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:56:46,672 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:46,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:56:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 11:56:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 11:56:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-09-20 11:56:46,677 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2024-09-20 11:56:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:46,677 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-09-20 11:56:46,678 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-09-20 11:56:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 11:56:46,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:46,679 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:46,690 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:46,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:46,880 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:46,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1019175001, now seen corresponding path program 1 times [2024-09-20 11:56:46,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:46,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851009040] [2024-09-20 11:56:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:56:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851009040] [2024-09-20 11:56:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851009040] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290814467] [2024-09-20 11:56:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:47,004 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) [2024-09-20 11:56:47,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 11:56:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:47,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 11:56:47,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:56:47,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:56:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290814467] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:47,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-20 11:56:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694946510] [2024-09-20 11:56:47,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:47,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 11:56:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 11:56:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:56:47,113 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:47,169 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2024-09-20 11:56:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 11:56:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-20 11:56:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:47,171 INFO L225 Difference]: With dead ends: 72 [2024-09-20 11:56:47,171 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 11:56:47,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:56:47,172 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:47,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:56:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 11:56:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-09-20 11:56:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-20 11:56:47,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 33 [2024-09-20 11:56:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:47,179 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-20 11:56:47,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:47,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-20 11:56:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 11:56:47,180 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:47,180 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:47,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:47,381 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash -243950740, now seen corresponding path program 2 times [2024-09-20 11:56:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179080213] [2024-09-20 11:56:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:47,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 11:56:47,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179080213] [2024-09-20 11:56:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179080213] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994298587] [2024-09-20 11:56:47,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:47,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:47,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:47,602 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 11:56:47,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 11:56:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:47,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 11:56:47,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 11:56:47,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:56:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994298587] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:47,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:56:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-09-20 11:56:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968623110] [2024-09-20 11:56:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:47,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 11:56:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 11:56:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-20 11:56:47,720 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:47,746 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-09-20 11:56:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 11:56:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-20 11:56:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:47,747 INFO L225 Difference]: With dead ends: 37 [2024-09-20 11:56:47,747 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 11:56:47,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:56:47,749 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:47,750 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:56:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 11:56:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 11:56:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 11:56:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 11:56:47,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2024-09-20 11:56:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:47,753 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 11:56:47,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:47,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 11:56:47,754 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 11:56:47,756 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 11:56:47,770 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:47,960 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:47,965 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-09-20 11:56:47,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 11:56:48,015 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 11:56:48,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 11:56:48 BoogieIcfgContainer [2024-09-20 11:56:48,026 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 11:56:48,027 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 11:56:48,027 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 11:56:48,027 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 11:56:48,027 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:45" (3/4) ... [2024-09-20 11:56:48,029 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 11:56:48,064 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 11:56:48,064 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 11:56:48,064 INFO L158 Benchmark]: Toolchain (without parser) took 3283.40ms. Allocated memory was 188.7MB in the beginning and 239.1MB in the end (delta: 50.3MB). Free memory was 143.6MB in the beginning and 159.1MB in the end (delta: -15.5MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,064 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 188.7MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 11:56:48,065 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 188.7MB. Free memory was 142.8MB in the beginning and 130.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,065 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.25ms. Allocated memory is still 188.7MB. Free memory was 130.1MB in the beginning and 128.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,065 INFO L158 Benchmark]: Boogie Preprocessor took 32.43ms. Allocated memory is still 188.7MB. Free memory was 128.9MB in the beginning and 126.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,066 INFO L158 Benchmark]: RCFGBuilder took 290.93ms. Allocated memory is still 188.7MB. Free memory was 126.8MB in the beginning and 111.3MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,066 INFO L158 Benchmark]: TraceAbstraction took 2695.93ms. Allocated memory was 188.7MB in the beginning and 239.1MB in the end (delta: 50.3MB). Free memory was 110.8MB in the beginning and 161.2MB in the end (delta: -50.4MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,068 INFO L158 Benchmark]: Witness Printer took 37.28ms. Allocated memory is still 239.1MB. Free memory was 161.2MB in the beginning and 159.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 11:56:48,070 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 188.7MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.33ms. Allocated memory is still 188.7MB. Free memory was 142.8MB in the beginning and 130.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.25ms. Allocated memory is still 188.7MB. Free memory was 130.1MB in the beginning and 128.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.43ms. Allocated memory is still 188.7MB. Free memory was 128.9MB in the beginning and 126.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 290.93ms. Allocated memory is still 188.7MB. Free memory was 126.8MB in the beginning and 111.3MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2695.93ms. Allocated memory was 188.7MB in the beginning and 239.1MB in the end (delta: 50.3MB). Free memory was 110.8MB in the beginning and 161.2MB in the end (delta: -50.4MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. * Witness Printer took 37.28ms. Allocated memory is still 239.1MB. Free memory was 161.2MB in the beginning and 159.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 20]: 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 4 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 443 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 319 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 193 IncrementalHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 124 mSDtfsCounter, 193 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 20 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 269 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 2 NumberOfNonLiveVariables, 485 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 131/176 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 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 18]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 11:56:48,094 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE