./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_2-2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/array_2-2.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 866342b97e5be917007cb97e07a0644c7c9d2aa9b428c32cf026d727d672a191 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:18:02,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:18:02,683 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:18:02,688 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:18:02,689 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:18:02,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:18:02,723 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:18:02,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:18:02,724 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:18:02,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:18:02,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:18:02,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:18:02,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:18:02,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:18:02,729 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:18:02,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:18:02,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:18:02,730 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:18:02,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:18:02,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:18:02,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:18:02,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:18:02,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:18:02,735 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:18:02,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:18:02,735 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:18:02,736 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:18:02,736 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:18:02,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:18:02,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:18:02,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:18:02,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:18:02,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:18:02,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:18:02,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:18:02,738 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:18:02,738 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:18:02,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:18:02,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:18:02,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:18:02,740 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:18:02,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:18:02,741 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 -> 866342b97e5be917007cb97e07a0644c7c9d2aa9b428c32cf026d727d672a191 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:18:03,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:18:03,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:18:03,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:18:03,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:18:03,093 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:18:03,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/array_2-2.i [2024-09-25 10:18:04,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:18:04,850 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:18:04,851 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_2-2.i [2024-09-25 10:18:04,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/42aad2d95/1dea98515c414938a42da102427ca7c0/FLAG405c26562 [2024-09-25 10:18:05,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/42aad2d95/1dea98515c414938a42da102427ca7c0 [2024-09-25 10:18:05,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:18:05,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:18:05,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:18:05,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:18:05,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:18:05,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d96260b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05, skipping insertion in model container [2024-09-25 10:18:05,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,249 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:18:05,394 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/loop-acceleration/array_2-2.i[849,862] [2024-09-25 10:18:05,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:18:05,428 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:18:05,442 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/loop-acceleration/array_2-2.i[849,862] [2024-09-25 10:18:05,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:18:05,467 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:18:05,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05 WrapperNode [2024-09-25 10:18:05,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:18:05,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:18:05,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:18:05,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:18:05,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,490 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:18:05,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:18:05,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:18:05,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:18:05,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:18:05,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,502 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,524 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 1, 2]. [2024-09-25 10:18:05,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,534 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:18:05,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:18:05,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:18:05,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:18:05,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (1/1) ... [2024-09-25 10:18:05,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:18:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:05,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 10:18:05,586 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 10:18:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:18:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:18:05,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:18:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:18:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 10:18:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 10:18:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 10:18:05,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 10:18:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 10:18:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 10:18:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:18:05,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:18:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:18:05,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:18:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 10:18:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 10:18:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 10:18:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:18:05,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:18:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 10:18:05,717 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:18:05,720 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:18:05,897 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 10:18:05,898 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:18:05,926 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:18:05,926 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:18:05,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:18:05 BoogieIcfgContainer [2024-09-25 10:18:05,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:18:05,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:18:05,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:18:05,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:18:05,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:18:05" (1/3) ... [2024-09-25 10:18:05,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407a4281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:18:05, skipping insertion in model container [2024-09-25 10:18:05,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:05" (2/3) ... [2024-09-25 10:18:05,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407a4281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:18:05, skipping insertion in model container [2024-09-25 10:18:05,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:18:05" (3/3) ... [2024-09-25 10:18:05,936 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2024-09-25 10:18:05,965 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:18:05,966 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:18:06,026 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:18:06,034 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;@1573e0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:18:06,034 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:18:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2024-09-25 10:18:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:18:06,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:06,047 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:06,048 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:06,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -300047682, now seen corresponding path program 1 times [2024-09-25 10:18:06,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:06,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721928851] [2024-09-25 10:18:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:06,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:06,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:18:06,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721928851] [2024-09-25 10:18:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721928851] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:18:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:18:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:18:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358888131] [2024-09-25 10:18:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:18:06,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:18:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:18:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:18:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:18:06,336 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-25 10:18:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:18:06,398 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-09-25 10:18:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:18:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2024-09-25 10:18:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:18:06,406 INFO L225 Difference]: With dead ends: 36 [2024-09-25 10:18:06,406 INFO L226 Difference]: Without dead ends: 16 [2024-09-25 10:18:06,408 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 [2024-09-25 10:18:06,414 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:18:06,415 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:18:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-25 10:18:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-25 10:18:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2024-09-25 10:18:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-09-25 10:18:06,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2024-09-25 10:18:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:18:06,450 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-09-25 10:18:06,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-25 10:18:06,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-09-25 10:18:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-25 10:18:06,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:06,451 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:06,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:18:06,452 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:06,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1123868211, now seen corresponding path program 1 times [2024-09-25 10:18:06,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256108814] [2024-09-25 10:18:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:06,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:06,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:18:06,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:06,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256108814] [2024-09-25 10:18:06,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256108814] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:18:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525745491] [2024-09-25 10:18:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:06,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:18:06,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:18:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:06,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-25 10:18:06,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:18:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:18:06,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:18:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:18:06,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525745491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:18:06,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:18:06,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-25 10:18:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647581902] [2024-09-25 10:18:06,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:18:06,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:18:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:18:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:18:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:18:06,766 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-09-25 10:18:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:18:06,836 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-09-25 10:18:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:18:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 15 [2024-09-25 10:18:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:18:06,838 INFO L225 Difference]: With dead ends: 31 [2024-09-25 10:18:06,838 INFO L226 Difference]: Without dead ends: 22 [2024-09-25 10:18:06,838 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:18:06,839 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:18:06,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:18:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-25 10:18:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-25 10:18:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2024-09-25 10:18:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-09-25 10:18:06,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2024-09-25 10:18:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:18:06,846 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-09-25 10:18:06,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-09-25 10:18:06,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-09-25 10:18:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:18:06,848 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:06,848 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:06,866 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:18:07,049 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:07,049 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:07,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1437846270, now seen corresponding path program 2 times [2024-09-25 10:18:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:07,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31222753] [2024-09-25 10:18:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:07,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:18:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31222753] [2024-09-25 10:18:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31222753] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:18:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104599211] [2024-09-25 10:18:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:18:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:07,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:18:07,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:18:07,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:18:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:18:07,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:18:07,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:18:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:18:07,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:18:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:18:07,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104599211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:18:07,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:18:07,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-25 10:18:07,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193502353] [2024-09-25 10:18:07,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:18:07,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:18:07,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:18:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:18:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:18:07,541 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2024-09-25 10:18:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:18:07,623 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-09-25 10:18:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:18:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 21 [2024-09-25 10:18:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:18:07,625 INFO L225 Difference]: With dead ends: 46 [2024-09-25 10:18:07,625 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 10:18:07,626 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:18:07,627 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:18:07,628 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:18:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 10:18:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-25 10:18:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2024-09-25 10:18:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-09-25 10:18:07,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 21 [2024-09-25 10:18:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:18:07,639 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-09-25 10:18:07,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2024-09-25 10:18:07,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-09-25 10:18:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:18:07,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:07,641 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:07,659 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 10:18:07,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:07,847 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:07,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2087834462, now seen corresponding path program 3 times [2024-09-25 10:18:07,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:07,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636061791] [2024-09-25 10:18:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:07,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:08,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:18:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636061791] [2024-09-25 10:18:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636061791] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:18:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665465879] [2024-09-25 10:18:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:18:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:08,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:18:08,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:18:08,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:18:08,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:18:08,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:18:08,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:18:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:18:08,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:18:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:18:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665465879] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:18:08,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:18:08,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-25 10:18:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968913692] [2024-09-25 10:18:08,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:18:08,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:18:08,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:18:08,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:18:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:18:08,893 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2024-09-25 10:18:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:18:09,000 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2024-09-25 10:18:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:18:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 [2024-09-25 10:18:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:18:09,002 INFO L225 Difference]: With dead ends: 76 [2024-09-25 10:18:09,002 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 10:18:09,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:18:09,004 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:18:09,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:18:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 10:18:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-25 10:18:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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) [2024-09-25 10:18:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-09-25 10:18:09,016 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 33 [2024-09-25 10:18:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:18:09,016 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-09-25 10:18:09,017 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2024-09-25 10:18:09,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-09-25 10:18:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-25 10:18:09,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:09,020 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:09,040 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:18:09,226 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 [2024-09-25 10:18:09,227 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 392977438, now seen corresponding path program 4 times [2024-09-25 10:18:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964786697] [2024-09-25 10:18:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:10,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-25 10:18:10,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964786697] [2024-09-25 10:18:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964786697] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:18:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462975260] [2024-09-25 10:18:10,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:18:10,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:10,116 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) [2024-09-25 10:18:10,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:18:10,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:18:10,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:18:10,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:18:10,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:18:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-25 10:18:10,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:18:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-25 10:18:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462975260] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:18:11,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:18:11,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-25 10:18:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359011674] [2024-09-25 10:18:11,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:18:11,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:18:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:18:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:18:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:18:11,212 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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) [2024-09-25 10:18:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:18:11,472 INFO L93 Difference]: Finished difference Result 136 states and 185 transitions. [2024-09-25 10:18:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-25 10:18:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 57 [2024-09-25 10:18:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:18:11,474 INFO L225 Difference]: With dead ends: 136 [2024-09-25 10:18:11,474 INFO L226 Difference]: Without dead ends: 106 [2024-09-25 10:18:11,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:18:11,476 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:18:11,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:18:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-25 10:18:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-09-25 10:18:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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) [2024-09-25 10:18:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2024-09-25 10:18:11,506 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 57 [2024-09-25 10:18:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:18:11,506 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2024-09-25 10:18:11,507 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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) [2024-09-25 10:18:11,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2024-09-25 10:18:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-25 10:18:11,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:18:11,511 INFO L216 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:18:11,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:18:11,715 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 [2024-09-25 10:18:11,716 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:18:11,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:18:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2001515106, now seen corresponding path program 5 times [2024-09-25 10:18:11,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:18:11,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648443268] [2024-09-25 10:18:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:18:11,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:18:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:14,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:18:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:18:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-09-25 10:18:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:18:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648443268] [2024-09-25 10:18:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648443268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:18:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397997394] [2024-09-25 10:18:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:18:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:18:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:18:14,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:18:14,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process