./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_2-2-simple.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/array_2-2-simple.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 c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 21:13:25,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 21:13:25,377 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 21:13:25,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 21:13:25,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 21:13:25,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 21:13:25,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 21:13:25,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 21:13:25,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 21:13:25,420 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 21:13:25,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 21:13:25,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 21:13:25,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 21:13:25,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 21:13:25,424 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 21:13:25,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 21:13:25,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 21:13:25,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 21:13:25,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 21:13:25,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 21:13:25,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 21:13:25,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 21:13:25,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 21:13:25,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 21:13:25,426 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 21:13:25,426 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 21:13:25,426 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 21:13:25,426 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 21:13:25,427 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 21:13:25,427 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 21:13:25,427 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 21:13:25,427 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 21:13:25,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:13:25,428 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 21:13:25,428 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 21:13:25,428 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 21:13:25,429 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 21:13:25,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 21:13:25,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 21:13:25,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 21:13:25,430 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 21:13:25,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 21:13:25,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 21:13:25,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 21:13:25,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 21:13:25,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 21:13:25,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 21:13:25,632 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 21:13:25,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2024-09-12 21:13:26,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 21:13:26,992 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 21:13:26,992 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2024-09-12 21:13:26,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/228279c71/f63e0797031243729bea62bfc1775b2a/FLAG98b5ba7c7 [2024-09-12 21:13:27,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/228279c71/f63e0797031243729bea62bfc1775b2a [2024-09-12 21:13:27,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 21:13:27,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 21:13:27,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 21:13:27,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 21:13:27,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 21:13:27,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73434b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27, skipping insertion in model container [2024-09-12 21:13:27,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,431 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 21:13:27,531 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2024-09-12 21:13:27,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:13:27,552 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 21:13:27,561 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2024-09-12 21:13:27,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:13:27,578 INFO L204 MainTranslator]: Completed translation [2024-09-12 21:13:27,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27 WrapperNode [2024-09-12 21:13:27,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 21:13:27,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 21:13:27,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 21:13:27,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 21:13:27,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,595 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 21:13:27,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 21:13:27,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 21:13:27,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 21:13:27,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 21:13:27,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,610 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,625 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 5 writes are split as follows [0, 3, 2]. [2024-09-12 21:13:27,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 21:13:27,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 21:13:27,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 21:13:27,643 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 21:13:27,644 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (1/1) ... [2024-09-12 21:13:27,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:13:27,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:27,670 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) [2024-09-12 21:13:27,671 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 [2024-09-12 21:13:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 21:13:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 21:13:27,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 21:13:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 21:13:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 21:13:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 21:13:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-09-12 21:13:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 21:13:27,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 21:13:27,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 21:13:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 21:13:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 21:13:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 21:13:27,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 21:13:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 21:13:27,774 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 21:13:27,776 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 21:13:27,866 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-12 21:13:27,866 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 21:13:27,884 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 21:13:27,885 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 21:13:27,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:13:27 BoogieIcfgContainer [2024-09-12 21:13:27,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 21:13:27,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 21:13:27,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 21:13:27,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 21:13:27,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 09:13:27" (1/3) ... [2024-09-12 21:13:27,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36319b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:13:27, skipping insertion in model container [2024-09-12 21:13:27,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:13:27" (2/3) ... [2024-09-12 21:13:27,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36319b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:13:27, skipping insertion in model container [2024-09-12 21:13:27,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:13:27" (3/3) ... [2024-09-12 21:13:27,891 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2024-09-12 21:13:27,904 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 21:13:27,905 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 21:13:27,954 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 21:13:27,959 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;@e7f9609, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 21:13:27,960 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 21:13:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-12 21:13:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-12 21:13:27,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:27,971 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:27,972 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -263571753, now seen corresponding path program 1 times [2024-09-12 21:13:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:27,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586415665] [2024-09-12 21:13:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586415665] [2024-09-12 21:13:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586415665] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:13:28,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:13:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 21:13:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324642201] [2024-09-12 21:13:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:13:28,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 21:13:28,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 21:13:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 21:13:28,216 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-12 21:13:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:28,247 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-09-12 21:13:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 21:13:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2024-09-12 21:13:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:28,253 INFO L225 Difference]: With dead ends: 31 [2024-09-12 21:13:28,254 INFO L226 Difference]: Without dead ends: 13 [2024-09-12 21:13:28,256 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 [2024-09-12 21:13:28,259 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:13:28,259 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:13:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-12 21:13:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-12 21:13:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2024-09-12 21:13:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-09-12 21:13:28,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2024-09-12 21:13:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:28,290 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-09-12 21:13:28,291 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-12 21:13:28,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-09-12 21:13:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 21:13:28,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:28,293 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:28,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 21:13:28,294 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:28,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 282385487, now seen corresponding path program 1 times [2024-09-12 21:13:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:28,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149185634] [2024-09-12 21:13:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:28,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:28,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149185634] [2024-09-12 21:13:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149185634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:28,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891674316] [2024-09-12 21:13:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:28,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:28,429 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) [2024-09-12 21:13:28,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 21:13:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-12 21:13:28,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:13:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:28,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:13:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:28,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891674316] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:13:28,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:13:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 21:13:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114837811] [2024-09-12 21:13:28,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:13:28,573 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 21:13:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:28,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 21:13:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 21:13:28,575 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-09-12 21:13:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:28,593 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-12 21:13:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 21:13:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 12 [2024-09-12 21:13:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:28,595 INFO L225 Difference]: With dead ends: 22 [2024-09-12 21:13:28,595 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 21:13:28,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 21:13:28,596 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:13:28,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:13:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 21:13:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 21:13:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2024-09-12 21:13:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-09-12 21:13:28,604 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2024-09-12 21:13:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:28,605 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-09-12 21:13:28,605 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-09-12 21:13:28,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-09-12 21:13:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 21:13:28,606 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:28,606 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:28,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 21:13:28,810 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 [2024-09-12 21:13:28,811 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:28,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash 277075159, now seen corresponding path program 2 times [2024-09-12 21:13:28,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:28,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340800766] [2024-09-12 21:13:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340800766] [2024-09-12 21:13:28,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340800766] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989898993] [2024-09-12 21:13:28,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:13:28,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:28,959 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) [2024-09-12 21:13:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 21:13:29,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:13:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:13:29,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 21:13:29,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:13:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:29,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:13:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989898993] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:13:29,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:13:29,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 21:13:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949022502] [2024-09-12 21:13:29,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:13:29,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 21:13:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 21:13:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:13:29,121 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-09-12 21:13:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:29,139 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-09-12 21:13:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 21:13:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 [2024-09-12 21:13:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:29,140 INFO L225 Difference]: With dead ends: 28 [2024-09-12 21:13:29,140 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 21:13:29,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:13:29,141 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:13:29,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:13:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 21:13:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 21:13:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2024-09-12 21:13:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2024-09-12 21:13:29,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2024-09-12 21:13:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:29,146 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2024-09-12 21:13:29,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-09-12 21:13:29,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2024-09-12 21:13:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 21:13:29,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:29,147 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:29,159 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 21:13:29,347 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 [2024-09-12 21:13:29,348 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:29,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1676943831, now seen corresponding path program 3 times [2024-09-12 21:13:29,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:29,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109114906] [2024-09-12 21:13:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:29,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:29,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109114906] [2024-09-12 21:13:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109114906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158163621] [2024-09-12 21:13:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:13:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:29,556 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) [2024-09-12 21:13:29,557 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 21:13:29,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 21:13:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:13:29,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 21:13:29,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:13:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:29,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:13:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158163621] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:13:29,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:13:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-12 21:13:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224748161] [2024-09-12 21:13:29,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:13:29,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 21:13:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 21:13:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-12 21:13:29,832 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2024-09-12 21:13:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:29,869 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-09-12 21:13:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 21:13:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 [2024-09-12 21:13:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:29,871 INFO L225 Difference]: With dead ends: 40 [2024-09-12 21:13:29,871 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 21:13:29,871 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-12 21:13:29,872 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:13:29,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:13:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 21:13:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-12 21:13:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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) [2024-09-12 21:13:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2024-09-12 21:13:29,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2024-09-12 21:13:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:29,884 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2024-09-12 21:13:29,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2024-09-12 21:13:29,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2024-09-12 21:13:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 21:13:29,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:29,885 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:29,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 21:13:30,085 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 [2024-09-12 21:13:30,086 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:30,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1214546985, now seen corresponding path program 4 times [2024-09-12 21:13:30,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:30,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996793166] [2024-09-12 21:13:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:30,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996793166] [2024-09-12 21:13:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996793166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733255593] [2024-09-12 21:13:30,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:13:30,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:30,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:30,509 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) [2024-09-12 21:13:30,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 21:13:30,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:13:30,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:13:30,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 21:13:30,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:13:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:30,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:13:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733255593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:13:31,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:13:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-12 21:13:31,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475706665] [2024-09-12 21:13:31,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:13:31,261 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 21:13:31,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 21:13:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 21:13:31,262 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2024-09-12 21:13:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:31,324 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2024-09-12 21:13:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 21:13:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 [2024-09-12 21:13:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:31,326 INFO L225 Difference]: With dead ends: 64 [2024-09-12 21:13:31,326 INFO L226 Difference]: Without dead ends: 58 [2024-09-12 21:13:31,327 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 21:13:31,328 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 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 [2024-09-12 21:13:31,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:13:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-12 21:13:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-12 21:13:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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) [2024-09-12 21:13:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2024-09-12 21:13:31,339 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 33 [2024-09-12 21:13:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:31,340 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2024-09-12 21:13:31,340 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2024-09-12 21:13:31,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2024-09-12 21:13:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 21:13:31,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:31,342 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:31,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 21:13:31,546 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 [2024-09-12 21:13:31,547 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:31,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1657090007, now seen corresponding path program 5 times [2024-09-12 21:13:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318884776] [2024-09-12 21:13:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:32,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318884776] [2024-09-12 21:13:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318884776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042325967] [2024-09-12 21:13:32,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 21:13:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:32,874 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) [2024-09-12 21:13:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 21:13:40,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-12 21:13:40,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:13:40,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 21:13:40,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:13:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:40,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:13:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042325967] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:13:42,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:13:42,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-09-12 21:13:42,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081098898] [2024-09-12 21:13:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:13:42,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-09-12 21:13:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:13:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-09-12 21:13:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-09-12 21:13:42,578 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2024-09-12 21:13:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:13:42,668 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2024-09-12 21:13:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-12 21:13:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 [2024-09-12 21:13:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:13:42,670 INFO L225 Difference]: With dead ends: 112 [2024-09-12 21:13:42,670 INFO L226 Difference]: Without dead ends: 106 [2024-09-12 21:13:42,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-09-12 21:13:42,674 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:13:42,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:13:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-12 21:13:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-09-12 21:13:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 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) [2024-09-12 21:13:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2024-09-12 21:13:42,687 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 57 [2024-09-12 21:13:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:13:42,687 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2024-09-12 21:13:42,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2024-09-12 21:13:42,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2024-09-12 21:13:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-12 21:13:42,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:13:42,689 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:13:42,711 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 21:13:42,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 21:13:42,890 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:13:42,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:13:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1854183383, now seen corresponding path program 6 times [2024-09-12 21:13:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:13:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051528438] [2024-09-12 21:13:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:13:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:13:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:46,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:13:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:13:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:13:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:13:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051528438] [2024-09-12 21:13:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051528438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:13:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289737216] [2024-09-12 21:13:46,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 21:13:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:13:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:13:46,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:13:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 21:26:17,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-12 21:26:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:26:17,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-12 21:26:17,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:26:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:26:17,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:26:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:26:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289737216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:26:24,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:26:24,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-09-12 21:26:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005957927] [2024-09-12 21:26:24,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:26:24,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-09-12 21:26:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:26:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-09-12 21:26:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-09-12 21:26:24,560 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2024-09-12 21:26:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:26:24,816 INFO L93 Difference]: Finished difference Result 208 states and 303 transitions. [2024-09-12 21:26:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-09-12 21:26:24,817 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 105 [2024-09-12 21:26:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:26:24,819 INFO L225 Difference]: With dead ends: 208 [2024-09-12 21:26:24,821 INFO L226 Difference]: Without dead ends: 202 [2024-09-12 21:26:24,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-09-12 21:26:24,824 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:26:24,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:26:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-12 21:26:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2024-09-12 21:26:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 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) [2024-09-12 21:26:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2024-09-12 21:26:24,846 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 105 [2024-09-12 21:26:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:26:24,847 INFO L474 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2024-09-12 21:26:24,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2024-09-12 21:26:24,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:26:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2024-09-12 21:26:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-09-12 21:26:24,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:26:24,850 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:26:25,050 WARN L435 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process [2024-09-12 21:26:25,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 21:26:25,089 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:26:25,089 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:26:25,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:26:25,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1951176745, now seen corresponding path program 7 times [2024-09-12 21:26:25,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:26:25,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674893531] [2024-09-12 21:26:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:26:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:26:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:26:38,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:26:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:26:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:26:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:26:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674893531] [2024-09-12 21:26:38,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674893531] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:26:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340257136] [2024-09-12 21:26:38,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 21:26:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:26:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:26:38,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:26:38,301 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 21:26:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:26:38,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-09-12 21:26:38,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:26:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:26:38,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:27:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:27:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340257136] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:27:05,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:27:05,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-09-12 21:27:05,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922390111] [2024-09-12 21:27:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:27:05,401 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-09-12 21:27:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:27:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-09-12 21:27:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-09-12 21:27:05,419 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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) [2024-09-12 21:27:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:27:06,356 INFO L93 Difference]: Finished difference Result 400 states and 591 transitions. [2024-09-12 21:27:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-09-12 21:27:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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 201 [2024-09-12 21:27:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:27:06,360 INFO L225 Difference]: With dead ends: 400 [2024-09-12 21:27:06,360 INFO L226 Difference]: Without dead ends: 394 [2024-09-12 21:27:06,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-09-12 21:27:06,365 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:27:06,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 21:27:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-09-12 21:27:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2024-09-12 21:27:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.0025706940874035) internal successors, (390), 389 states have internal predecessors, (390), 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) [2024-09-12 21:27:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 394 transitions. [2024-09-12 21:27:06,386 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 394 transitions. Word has length 201 [2024-09-12 21:27:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:27:06,387 INFO L474 AbstractCegarLoop]: Abstraction has 394 states and 394 transitions. [2024-09-12 21:27:06,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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) [2024-09-12 21:27:06,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:27:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 394 transitions. [2024-09-12 21:27:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2024-09-12 21:27:06,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:27:06,393 INFO L216 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:27:06,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 21:27:06,594 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:27:06,594 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:27:06,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:27:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1557202903, now seen corresponding path program 8 times [2024-09-12 21:27:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:27:06,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317199920] [2024-09-12 21:27:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:27:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:27:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15