./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_05.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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 22:58:13,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 22:58:13,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 22:58:13,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 22:58:13,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 22:58:13,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 22:58:13,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 22:58:13,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 22:58:13,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 22:58:13,913 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 22:58:13,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 22:58:13,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 22:58:13,915 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 22:58:13,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 22:58:13,917 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 22:58:13,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 22:58:13,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 22:58:13,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 22:58:13,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 22:58:13,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 22:58:13,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 22:58:13,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 22:58:13,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 22:58:13,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 22:58:13,923 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 22:58:13,923 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 22:58:13,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 22:58:13,924 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 22:58:13,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 22:58:13,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 22:58:13,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 22:58:13,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 22:58:13,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:58:13,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 22:58:13,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 22:58:13,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 22:58:13,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 22:58:13,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 22:58:13,926 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 22:58:13,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 22:58:13,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 22:58:13,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 22:58:13,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 22:58:14,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 22:58:14,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 22:58:14,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 22:58:14,217 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 22:58:14,217 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 22:58:14,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_05.i [2024-09-24 22:58:15,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 22:58:15,804 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 22:58:15,805 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i [2024-09-24 22:58:15,812 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/65ab1fdfb/39707fd05463430da1b8694e37dcf8d4/FLAG8d03f4c34 [2024-09-24 22:58:16,197 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/65ab1fdfb/39707fd05463430da1b8694e37dcf8d4 [2024-09-24 22:58:16,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 22:58:16,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 22:58:16,202 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 22:58:16,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 22:58:16,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 22:58:16,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3e271a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16, skipping insertion in model container [2024-09-24 22:58:16,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,231 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 22:58:16,382 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-24 22:58:16,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:58:16,434 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 22:58:16,474 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-24 22:58:16,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:58:16,507 INFO L204 MainTranslator]: Completed translation [2024-09-24 22:58:16,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16 WrapperNode [2024-09-24 22:58:16,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 22:58:16,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 22:58:16,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 22:58:16,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 22:58:16,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,547 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 22:58:16,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 22:58:16,549 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 22:58:16,549 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 22:58:16,549 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 22:58:16,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,594 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 11, 2]. 73 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-09-24 22:58:16,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,606 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,614 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 22:58:16,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 22:58:16,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 22:58:16,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 22:58:16,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (1/1) ... [2024-09-24 22:58:16,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:58:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:16,660 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) [2024-09-24 22:58:16,663 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 [2024-09-24 22:58:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 22:58:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 22:58:16,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 22:58:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 22:58:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-24 22:58:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-24 22:58:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-24 22:58:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-24 22:58:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-24 22:58:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-24 22:58:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 22:58:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 22:58:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2024-09-24 22:58:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2024-09-24 22:58:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 22:58:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 22:58:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-24 22:58:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-24 22:58:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-24 22:58:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 22:58:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 22:58:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-24 22:58:16,799 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 22:58:16,801 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 22:58:16,981 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-24 22:58:16,981 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 22:58:17,007 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 22:58:17,007 INFO L317 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-24 22:58:17,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:17 BoogieIcfgContainer [2024-09-24 22:58:17,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 22:58:17,012 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 22:58:17,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 22:58:17,015 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 22:58:17,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:16" (1/3) ... [2024-09-24 22:58:17,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef15283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:17, skipping insertion in model container [2024-09-24 22:58:17,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:16" (2/3) ... [2024-09-24 22:58:17,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef15283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:17, skipping insertion in model container [2024-09-24 22:58:17,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:17" (3/3) ... [2024-09-24 22:58:17,018 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2024-09-24 22:58:17,032 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 22:58:17,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 22:58:17,079 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 22:58:17,085 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;@1331bb8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 22:58:17,086 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 22:58:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 22:58:17,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:17,098 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:17,098 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2080310768, now seen corresponding path program 1 times [2024-09-24 22:58:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:17,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433880416] [2024-09-24 22:58:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-24 22:58:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:17,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433880416] [2024-09-24 22:58:17,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433880416] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:17,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:58:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 22:58:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803613672] [2024-09-24 22:58:17,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:17,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 22:58:17,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:17,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 22:58:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 22:58:17,403 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 22:58:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:17,619 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2024-09-24 22:58:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 22:58:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-24 22:58:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:17,628 INFO L225 Difference]: With dead ends: 65 [2024-09-24 22:58:17,628 INFO L226 Difference]: Without dead ends: 36 [2024-09-24 22:58:17,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 22:58:17,635 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:17,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 7 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-24 22:58:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2024-09-24 22:58:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-24 22:58:17,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2024-09-24 22:58:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:17,687 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-24 22:58:17,688 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 22:58:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-24 22:58:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 22:58:17,691 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:17,691 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:17,692 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 22:58:17,692 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:17,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash 156377847, now seen corresponding path program 1 times [2024-09-24 22:58:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:17,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827445379] [2024-09-24 22:58:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-24 22:58:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:17,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:17,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827445379] [2024-09-24 22:58:17,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827445379] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:17,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:58:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 22:58:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562774203] [2024-09-24 22:58:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:17,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 22:58:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 22:58:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 22:58:17,815 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:18,003 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2024-09-24 22:58:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 22:58:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-24 22:58:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:18,005 INFO L225 Difference]: With dead ends: 56 [2024-09-24 22:58:18,005 INFO L226 Difference]: Without dead ends: 37 [2024-09-24 22:58:18,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-24 22:58:18,009 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:18,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-24 22:58:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-09-24 22:58:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-24 22:58:18,032 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-09-24 22:58:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:18,032 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-24 22:58:18,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:18,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-24 22:58:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 22:58:18,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:18,036 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:18,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 22:58:18,037 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash 364897058, now seen corresponding path program 1 times [2024-09-24 22:58:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017596926] [2024-09-24 22:58:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-24 22:58:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:18,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:18,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017596926] [2024-09-24 22:58:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017596926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871369018] [2024-09-24 22:58:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:18,197 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) [2024-09-24 22:58:18,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 22:58:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-24 22:58:18,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:18,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:18,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871369018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:18,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-09-24 22:58:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809767443] [2024-09-24 22:58:18,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:18,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 22:58:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 22:58:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-24 22:58:18,356 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 22:58:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:18,605 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-24 22:58:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 22:58:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-09-24 22:58:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:18,607 INFO L225 Difference]: With dead ends: 65 [2024-09-24 22:58:18,607 INFO L226 Difference]: Without dead ends: 46 [2024-09-24 22:58:18,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2024-09-24 22:58:18,609 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:18,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 7 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-24 22:58:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2024-09-24 22:58:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-09-24 22:58:18,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-09-24 22:58:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:18,620 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-09-24 22:58:18,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 22:58:18,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-09-24 22:58:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 22:58:18,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:18,622 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:18,640 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 22:58:18,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:18,827 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:18,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1764338249, now seen corresponding path program 2 times [2024-09-24 22:58:18,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:18,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772944922] [2024-09-24 22:58:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:18,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 22:58:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 22:58:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772944922] [2024-09-24 22:58:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772944922] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:58:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 22:58:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699381578] [2024-09-24 22:58:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:18,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 22:58:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 22:58:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-24 22:58:18,986 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:19,149 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-24 22:58:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 22:58:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-09-24 22:58:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:19,150 INFO L225 Difference]: With dead ends: 46 [2024-09-24 22:58:19,150 INFO L226 Difference]: Without dead ends: 34 [2024-09-24 22:58:19,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-24 22:58:19,152 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:19,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 7 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-24 22:58:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-24 22:58:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-24 22:58:19,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2024-09-24 22:58:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:19,163 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-24 22:58:19,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:19,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-24 22:58:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 22:58:19,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:19,165 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:19,165 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 22:58:19,165 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:19,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1674322940, now seen corresponding path program 1 times [2024-09-24 22:58:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560087864] [2024-09-24 22:58:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:19,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:19,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:19,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 22:58:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 22:58:19,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:19,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560087864] [2024-09-24 22:58:19,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560087864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85900966] [2024-09-24 22:58:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:19,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:19,356 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) [2024-09-24 22:58:19,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 22:58:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:19,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-24 22:58:19,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 22:58:19,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 22:58:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85900966] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:19,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-24 22:58:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655082082] [2024-09-24 22:58:19,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:19,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 22:58:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 22:58:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-24 22:58:19,583 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:20,104 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-24 22:58:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 22:58:20,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2024-09-24 22:58:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:20,106 INFO L225 Difference]: With dead ends: 70 [2024-09-24 22:58:20,106 INFO L226 Difference]: Without dead ends: 50 [2024-09-24 22:58:20,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2024-09-24 22:58:20,108 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 109 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:20,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 13 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 22:58:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-24 22:58:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2024-09-24 22:58:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-24 22:58:20,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-24 22:58:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:20,122 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-24 22:58:20,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:20,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-24 22:58:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 22:58:20,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:20,124 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:20,142 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:20,324 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:20,325 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:20,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2009987497, now seen corresponding path program 1 times [2024-09-24 22:58:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588729038] [2024-09-24 22:58:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:20,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:20,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:20,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 22:58:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588729038] [2024-09-24 22:58:20,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588729038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560951963] [2024-09-24 22:58:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:20,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:20,450 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) [2024-09-24 22:58:20,451 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 22:58:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:20,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-24 22:58:20,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 22:58:20,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 22:58:20,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560951963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:20,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:20,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2024-09-24 22:58:20,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449522967] [2024-09-24 22:58:20,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:20,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 22:58:20,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 22:58:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-24 22:58:20,785 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:21,348 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-09-24 22:58:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-24 22:58:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-09-24 22:58:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:21,350 INFO L225 Difference]: With dead ends: 83 [2024-09-24 22:58:21,350 INFO L226 Difference]: Without dead ends: 66 [2024-09-24 22:58:21,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 22:58:21,352 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 290 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:21,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 13 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 22:58:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-24 22:58:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-09-24 22:58:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-24 22:58:21,372 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 28 [2024-09-24 22:58:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:21,372 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-24 22:58:21,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:21,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-24 22:58:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-24 22:58:21,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:21,374 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:21,391 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 22:58:21,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 22:58:21,575 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:21,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 752690779, now seen corresponding path program 2 times [2024-09-24 22:58:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:21,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790460897] [2024-09-24 22:58:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:21,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:21,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-24 22:58:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790460897] [2024-09-24 22:58:21,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790460897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481115972] [2024-09-24 22:58:21,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:58:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:21,853 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) [2024-09-24 22:58:21,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 22:58:21,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:58:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:21,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-24 22:58:21,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-24 22:58:22,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-24 22:58:22,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481115972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:22,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:22,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-09-24 22:58:22,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822243254] [2024-09-24 22:58:22,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:22,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 22:58:22,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:22,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 22:58:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-09-24 22:58:22,414 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:22,672 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-09-24 22:58:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 22:58:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2024-09-24 22:58:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:22,674 INFO L225 Difference]: With dead ends: 84 [2024-09-24 22:58:22,675 INFO L226 Difference]: Without dead ends: 72 [2024-09-24 22:58:22,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2024-09-24 22:58:22,676 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:22,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 8 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-24 22:58:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-24 22:58:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-09-24 22:58:22,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2024-09-24 22:58:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:22,711 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-09-24 22:58:22,711 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-09-24 22:58:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-24 22:58:22,713 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:22,713 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:22,731 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 22:58:22,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:22,914 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:22,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1101248827, now seen corresponding path program 3 times [2024-09-24 22:58:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319575301] [2024-09-24 22:58:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:23,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:23,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-24 22:58:23,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319575301] [2024-09-24 22:58:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319575301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312139975] [2024-09-24 22:58:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 22:58:23,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:23,186 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) [2024-09-24 22:58:23,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 22:58:23,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-24 22:58:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:23,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 22:58:23,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:23,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-24 22:58:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-09-24 22:58:23,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 22:58:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312139975] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:23,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 22:58:23,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2024-09-24 22:58:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877646521] [2024-09-24 22:58:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:23,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 22:58:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 22:58:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-09-24 22:58:23,583 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:23,769 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-09-24 22:58:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 22:58:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2024-09-24 22:58:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:23,772 INFO L225 Difference]: With dead ends: 81 [2024-09-24 22:58:23,772 INFO L226 Difference]: Without dead ends: 79 [2024-09-24 22:58:23,773 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-09-24 22:58:23,774 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:23,774 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 107 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-24 22:58:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-24 22:58:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 69 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-09-24 22:58:23,820 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 64 [2024-09-24 22:58:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:23,820 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-09-24 22:58:23,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:58:23,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-09-24 22:58:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-24 22:58:23,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:23,822 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:23,842 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:24,026 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-24 22:58:24,027 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:24,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2042194420, now seen corresponding path program 1 times [2024-09-24 22:58:24,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:24,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861353692] [2024-09-24 22:58:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:24,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:24,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:24,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-24 22:58:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 147 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-24 22:58:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861353692] [2024-09-24 22:58:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861353692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980535979] [2024-09-24 22:58:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:24,262 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) [2024-09-24 22:58:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 22:58:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:24,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 22:58:24,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 22:58:24,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 29 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-24 22:58:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980535979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:24,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2024-09-24 22:58:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635853070] [2024-09-24 22:58:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:24,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 22:58:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 22:58:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-09-24 22:58:24,880 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:25,351 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-09-24 22:58:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-24 22:58:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2024-09-24 22:58:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:25,354 INFO L225 Difference]: With dead ends: 106 [2024-09-24 22:58:25,355 INFO L226 Difference]: Without dead ends: 81 [2024-09-24 22:58:25,358 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 22:58:25,359 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:25,360 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 10 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 22:58:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-24 22:58:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-24 22:58:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-24 22:58:25,387 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 71 [2024-09-24 22:58:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:25,388 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-24 22:58:25,388 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-24 22:58:25,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-24 22:58:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 22:58:25,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:25,391 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:25,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 22:58:25,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:25,592 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:25,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2083039638, now seen corresponding path program 2 times [2024-09-24 22:58:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696333045] [2024-09-24 22:58:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:26,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:26,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:27,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 22:58:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-24 22:58:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696333045] [2024-09-24 22:58:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696333045] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123314745] [2024-09-24 22:58:27,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:58:27,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:27,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:27,342 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) [2024-09-24 22:58:27,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 22:58:27,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:58:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:27,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 22:58:27,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:27,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:27,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-24 22:58:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-24 22:58:27,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 96 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-09-24 22:58:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123314745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:28,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:28,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 41 [2024-09-24 22:58:28,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930089804] [2024-09-24 22:58:28,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:28,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-24 22:58:28,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-24 22:58:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 22:58:28,547 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-24 22:58:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:30,242 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2024-09-24 22:58:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-24 22:58:30,242 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 74 [2024-09-24 22:58:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:30,244 INFO L225 Difference]: With dead ends: 161 [2024-09-24 22:58:30,244 INFO L226 Difference]: Without dead ends: 101 [2024-09-24 22:58:30,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=602, Invalid=3688, Unknown=0, NotChecked=0, Total=4290 [2024-09-24 22:58:30,247 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 216 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:30,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 8 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 22:58:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-24 22:58:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2024-09-24 22:58:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-09-24 22:58:30,300 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 74 [2024-09-24 22:58:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:30,300 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-09-24 22:58:30,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-24 22:58:30,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-09-24 22:58:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 22:58:30,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:30,302 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:30,316 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:30,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:30,503 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:30,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1642634130, now seen corresponding path program 1 times [2024-09-24 22:58:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981558319] [2024-09-24 22:58:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:30,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:30,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:31,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 22:58:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 129 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-24 22:58:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:31,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981558319] [2024-09-24 22:58:31,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981558319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:31,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800835771] [2024-09-24 22:58:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:31,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:58:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 22:58:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:31,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 22:58:31,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:31,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:31,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-24 22:58:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-09-24 22:58:32,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 80 proven. 7 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-24 22:58:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800835771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:32,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:32,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 36 [2024-09-24 22:58:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98214986] [2024-09-24 22:58:32,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:32,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 22:58:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 22:58:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 22:58:32,550 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-24 22:58:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:33,214 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2024-09-24 22:58:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 22:58:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 74 [2024-09-24 22:58:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:33,216 INFO L225 Difference]: With dead ends: 159 [2024-09-24 22:58:33,216 INFO L226 Difference]: Without dead ends: 101 [2024-09-24 22:58:33,217 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 22:58:33,218 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 106 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:33,218 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 5 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 22:58:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-24 22:58:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2024-09-24 22:58:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-09-24 22:58:33,251 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 74 [2024-09-24 22:58:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:33,251 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-09-24 22:58:33,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-24 22:58:33,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-09-24 22:58:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 22:58:33,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:33,253 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:33,268 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:33,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:33,454 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:33,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2086534804, now seen corresponding path program 2 times [2024-09-24 22:58:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377844296] [2024-09-24 22:58:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:33,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:34,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:34,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 22:58:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-24 22:58:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377844296] [2024-09-24 22:58:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377844296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024922270] [2024-09-24 22:58:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:58:34,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:34,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:58:34,040 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 22:58:34,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:58:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:34,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-24 22:58:34,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:34,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:34,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-24 22:58:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-24 22:58:34,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2024-09-24 22:58:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024922270] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 22:58:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17, 8] total 29 [2024-09-24 22:58:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884925038] [2024-09-24 22:58:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:34,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 22:58:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 22:58:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-09-24 22:58:34,796 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:35,022 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-24 22:58:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 22:58:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2024-09-24 22:58:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:35,023 INFO L225 Difference]: With dead ends: 158 [2024-09-24 22:58:35,023 INFO L226 Difference]: Without dead ends: 94 [2024-09-24 22:58:35,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 22:58:35,025 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:35,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-24 22:58:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-24 22:58:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:58:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2024-09-24 22:58:35,065 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 74 [2024-09-24 22:58:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:35,065 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2024-09-24 22:58:35,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2024-09-24 22:58:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 22:58:35,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:35,070 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:35,088 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 22:58:35,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-24 22:58:35,275 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2132308138, now seen corresponding path program 3 times [2024-09-24 22:58:35,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:35,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083645015] [2024-09-24 22:58:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:36,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:36,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:36,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 22:58:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-24 22:58:36,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083645015] [2024-09-24 22:58:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083645015] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010831810] [2024-09-24 22:58:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 22:58:36,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:36,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:58:36,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 22:58:36,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 22:58:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:36,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 22:58:36,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:36,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-24 22:58:36,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-09-24 22:58:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-24 22:58:37,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-24 22:58:37,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010831810] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:37,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:37,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 10] total 36 [2024-09-24 22:58:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601651066] [2024-09-24 22:58:37,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:37,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 22:58:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 22:58:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 22:58:37,667 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 22:58:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:39,332 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2024-09-24 22:58:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-24 22:58:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2024-09-24 22:58:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:39,333 INFO L225 Difference]: With dead ends: 151 [2024-09-24 22:58:39,333 INFO L226 Difference]: Without dead ends: 90 [2024-09-24 22:58:39,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2024-09-24 22:58:39,338 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:39,338 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 30 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 22:58:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-24 22:58:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-09-24 22:58:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 78 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 22:58:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2024-09-24 22:58:39,376 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 74 [2024-09-24 22:58:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:39,378 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2024-09-24 22:58:39,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 22:58:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2024-09-24 22:58:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-24 22:58:39,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:39,379 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:39,397 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 22:58:39,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-24 22:58:39,582 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:39,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1023722515, now seen corresponding path program 4 times [2024-09-24 22:58:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370137154] [2024-09-24 22:58:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:39,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:39,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 22:58:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:41,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-24 22:58:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:41,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 22:58:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 27 proven. 152 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-24 22:58:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370137154] [2024-09-24 22:58:41,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370137154] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131900352] [2024-09-24 22:58:41,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 22:58:41,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:41,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:41,469 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:58:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 22:58:41,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 22:58:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:41,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-24 22:58:41,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:41,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 7 [2024-09-24 22:58:42,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:42,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 47 [2024-09-24 22:58:42,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:42,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 17 [2024-09-24 22:58:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 84 proven. 122 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-24 22:58:42,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 164 proven. 24 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-24 22:58:47,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131900352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:47,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:47,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 15] total 60 [2024-09-24 22:58:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158080605] [2024-09-24 22:58:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:47,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-24 22:58:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-24 22:58:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3216, Unknown=1, NotChecked=0, Total=3540 [2024-09-24 22:58:47,218 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-24 22:59:00,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 22:59:32,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 22:59:41,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 22:59:42,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 22:59:46,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 22:59:51,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:00,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:04,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:08,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:13,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:25,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:29,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:36,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:41,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:00:58,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:02,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:03,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:07,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:11,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:19,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:01:37,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:02:10,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:02:14,943 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_SelectionSort_~i~0 4)) (.cse8 (* c_SelectionSort_~lh~0 4))) (let ((.cse7 (+ .cse8 |c_~#array~0.offset| 8)) (.cse4 (select |c_#memory_int#1| |c_~#array~0.base|)) (.cse10 (+ |c_~#array~0.offset| .cse5)) (.cse14 (select |c_old(#memory_int#1)| |c_~#array~0.base|))) (let ((.cse2 (not (= (select .cse14 (+ |c_~#array~0.offset| 12)) 0))) (.cse3 (select .cse4 .cse10)) (.cse0 (not (= 0 (select .cse14 (+ |c_~#array~0.offset| 8))))) (.cse12 (select .cse4 (+ .cse8 |c_~#array~0.offset| 4))) (.cse13 (select .cse4 .cse7)) (.cse11 (+ c_SelectionSort_~lh~0 4))) (and (= |c_~#array~0.base| |c_old(~#array~0.base)|) (let ((.cse1 (+ c_SelectionSort_~i~0 3))) (or .cse0 (< c_~n~0 .cse1) (and (or .cse2 (< .cse3 (select .cse4 (+ |c_~#array~0.offset| .cse5 4)))) (= .cse1 c_~n~0) (= c_SelectionSort_~i~0 c_SelectionSort_~rh~0)))) (forall ((v_ArrVal_626 Int)) (let ((.cse9 (+ .cse8 |c_~#array~0.offset|))) (or (let ((.cse6 (store (store .cse4 .cse9 .cse3) .cse10 v_ArrVal_626))) (< (select .cse6 .cse7) (+ (select .cse6 (+ .cse8 |c_~#array~0.offset| 12)) 1))) (< v_ArrVal_626 (select .cse4 .cse9))))) (= |c_old(~#array~0.offset)| |c_~#array~0.offset|) (or .cse2 .cse0 (< c_~n~0 .cse11) (< .cse12 .cse13)) (or .cse2 (< (select .cse4 (+ (* 4 c_SelectionSort_~rh~0) |c_~#array~0.offset|)) .cse3) .cse0 (< c_~n~0 (+ c_SelectionSort_~i~0 2))) (< .cse12 (+ .cse13 1)) (<= c_~n~0 .cse11) (= |c_old(~n~0)| c_~n~0))))) is different from false [2024-09-24 23:02:24,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:02:28,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-24 23:02:32,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]