./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --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-de32597-m [2024-09-18 16:46:23,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:46:23,671 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:46:23,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:46:23,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:46:23,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:46:23,699 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:46:23,700 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:46:23,700 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:46:23,701 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:46:23,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:46:23,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:46:23,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:46:23,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:46:23,703 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:46:23,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:46:23,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:46:23,704 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:46:23,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:46:23,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:46:23,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:46:23,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:46:23,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:46:23,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:46:23,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:46:23,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:46:23,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:46:23,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:46:23,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:46:23,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:46:23,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:46:23,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:46:23,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:46:23,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:46:23,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:46:23,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:46:23,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:46:23,931 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:46:23,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-18 16:46:25,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:46:25,243 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:46:25,244 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-18 16:46:25,250 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/919879375/76d0f91b27c541bbad8f4bb8bf0639a5/FLAG6fb4571d2 [2024-09-18 16:46:25,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/919879375/76d0f91b27c541bbad8f4bb8bf0639a5 [2024-09-18 16:46:25,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:46:25,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:46:25,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:46:25,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:46:25,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:46:25,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a8a3e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25, skipping insertion in model container [2024-09-18 16:46:25,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,693 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:46:25,809 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/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-18 16:46:25,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:46:25,832 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:46:25,840 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/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-18 16:46:25,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:46:25,862 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:46:25,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25 WrapperNode [2024-09-18 16:46:25,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:46:25,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:46:25,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:46:25,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:46:25,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,878 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:46:25,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:46:25,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:46:25,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:46:25,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:46:25,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,903 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 21, 15, 11, 5, 12]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 2, 2, 1, 2]. [2024-09-18 16:46:25,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,910 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:46:25,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:46:25,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:46:25,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:46:25,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (1/1) ... [2024-09-18 16:46:25,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:46:25,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:25,942 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) [2024-09-18 16:46:25,944 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 [2024-09-18 16:46:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:46:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:46:25,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:46:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:46:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-18 16:46:25,982 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:46:25,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:46:25,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:46:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:46:26,060 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:46:26,062 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:46:26,256 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-18 16:46:26,256 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:46:26,270 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:46:26,270 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:46:26,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:46:26 BoogieIcfgContainer [2024-09-18 16:46:26,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:46:26,272 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:46:26,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:46:26,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:46:26,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:46:25" (1/3) ... [2024-09-18 16:46:26,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a5cac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:46:26, skipping insertion in model container [2024-09-18 16:46:26,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:46:25" (2/3) ... [2024-09-18 16:46:26,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a5cac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:46:26, skipping insertion in model container [2024-09-18 16:46:26,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:46:26" (3/3) ... [2024-09-18 16:46:26,276 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-18 16:46:26,288 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:46:26,288 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:46:26,343 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:46:26,349 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;@7387c8a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:46:26,350 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:46:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 16:46:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-18 16:46:26,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:26,358 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:26,359 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:26,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 775072714, now seen corresponding path program 1 times [2024-09-18 16:46:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144014357] [2024-09-18 16:46:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:26,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:46:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:46:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144014357] [2024-09-18 16:46:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144014357] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:46:26,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:46:26,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:46:26,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992984453] [2024-09-18 16:46:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:46:26,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:46:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:46:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:46:27,005 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:46:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:46:27,246 INFO L93 Difference]: Finished difference Result 102 states and 152 transitions. [2024-09-18 16:46:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:46:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-18 16:46:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:46:27,255 INFO L225 Difference]: With dead ends: 102 [2024-09-18 16:46:27,255 INFO L226 Difference]: Without dead ends: 60 [2024-09-18 16:46:27,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:46:27,262 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:46:27,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:46:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-18 16:46:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-18 16:46:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-18 16:46:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-18 16:46:27,296 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2024-09-18 16:46:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:46:27,296 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-18 16:46:27,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:46:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-18 16:46:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 16:46:27,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:27,299 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:27,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:46:27,299 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:27,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1351765856, now seen corresponding path program 1 times [2024-09-18 16:46:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473078015] [2024-09-18 16:46:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:46:27,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914782966] [2024-09-18 16:46:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:27,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:27,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:27,335 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) [2024-09-18 16:46:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:46:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:27,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 16:46:27,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:46:27,452 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 11 treesize of output 7 [2024-09-18 16:46:27,457 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 11 treesize of output 7 [2024-09-18 16:46:27,463 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 11 treesize of output 7 [2024-09-18 16:46:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:46:27,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:46:27,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:27,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473078015] [2024-09-18 16:46:27,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:46:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914782966] [2024-09-18 16:46:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914782966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:46:27,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:46:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-18 16:46:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364153691] [2024-09-18 16:46:27,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:46:27,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:46:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:46:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:46:27,884 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:46:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:46:28,327 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-09-18 16:46:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:46:28,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-18 16:46:28,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:46:28,331 INFO L225 Difference]: With dead ends: 83 [2024-09-18 16:46:28,332 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 16:46:28,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:46:28,333 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:46:28,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 167 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:46:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 16:46:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-18 16:46:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 26 states have call successors, (26), 8 states have call predecessors, (26), 7 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-18 16:46:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2024-09-18 16:46:28,360 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 18 [2024-09-18 16:46:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:46:28,361 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2024-09-18 16:46:28,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:46:28,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2024-09-18 16:46:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:46:28,362 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:28,362 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:28,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:46:28,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:28,563 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:28,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1982254220, now seen corresponding path program 1 times [2024-09-18 16:46:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:28,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143739194] [2024-09-18 16:46:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:46:28,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924076398] [2024-09-18 16:46:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:28,586 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) [2024-09-18 16:46:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:46:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:28,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-18 16:46:28,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:46:28,684 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 11 treesize of output 7 [2024-09-18 16:46:28,688 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 11 treesize of output 7 [2024-09-18 16:46:28,695 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 11 treesize of output 7 [2024-09-18 16:46:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:46:28,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:46:29,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143739194] [2024-09-18 16:46:29,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:46:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924076398] [2024-09-18 16:46:29,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924076398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:46:29,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:46:29,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-18 16:46:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477589252] [2024-09-18 16:46:29,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:46:29,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:46:29,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:46:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:46:29,026 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:46:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:46:29,388 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-18 16:46:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:46:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-18 16:46:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:46:29,390 INFO L225 Difference]: With dead ends: 87 [2024-09-18 16:46:29,390 INFO L226 Difference]: Without dead ends: 85 [2024-09-18 16:46:29,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:46:29,391 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:46:29,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 163 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:46:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-18 16:46:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-09-18 16:46:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-18 16:46:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2024-09-18 16:46:29,416 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 24 [2024-09-18 16:46:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:46:29,416 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2024-09-18 16:46:29,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:46:29,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2024-09-18 16:46:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 16:46:29,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:29,418 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:29,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:46:29,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:29,624 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1760067974, now seen corresponding path program 1 times [2024-09-18 16:46:29,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:29,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907535382] [2024-09-18 16:46:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:29,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:46:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736207703] [2024-09-18 16:46:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:29,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:29,653 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) [2024-09-18 16:46:29,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:46:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:29,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-18 16:46:29,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:46:29,737 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 11 treesize of output 7 [2024-09-18 16:46:29,744 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 11 treesize of output 7 [2024-09-18 16:46:29,748 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 11 treesize of output 7 [2024-09-18 16:46:29,753 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 11 treesize of output 7 [2024-09-18 16:46:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:46:30,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:46:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:46:30,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907535382] [2024-09-18 16:46:30,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:46:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736207703] [2024-09-18 16:46:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736207703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:46:30,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:46:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-18 16:46:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032428198] [2024-09-18 16:46:30,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:46:30,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:46:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:46:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:46:30,572 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:46:36,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-18 16:46:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:46:37,055 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2024-09-18 16:46:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 16:46:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2024-09-18 16:46:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:46:37,074 INFO L225 Difference]: With dead ends: 113 [2024-09-18 16:46:37,074 INFO L226 Difference]: Without dead ends: 111 [2024-09-18 16:46:37,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2024-09-18 16:46:37,075 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:46:37,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 153 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2024-09-18 16:46:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-18 16:46:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-09-18 16:46:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-18 16:46:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2024-09-18 16:46:37,100 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 30 [2024-09-18 16:46:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:46:37,101 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2024-09-18 16:46:37,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:46:37,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2024-09-18 16:46:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:46:37,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:37,102 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:37,114 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:46:37,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:37,307 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:37,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1652310806, now seen corresponding path program 1 times [2024-09-18 16:46:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492172195] [2024-09-18 16:46:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:46:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688678593] [2024-09-18 16:46:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:37,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:37,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:37,329 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) [2024-09-18 16:46:37,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:46:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:37,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-18 16:46:37,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:46:37,411 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 11 treesize of output 7 [2024-09-18 16:46:37,429 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 11 treesize of output 7 [2024-09-18 16:46:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:46:39,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:46:39,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-09-18 16:46:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:46:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492172195] [2024-09-18 16:46:40,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:46:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688678593] [2024-09-18 16:46:40,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688678593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:46:40,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:46:40,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-18 16:46:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597286792] [2024-09-18 16:46:40,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:46:40,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 16:46:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 16:46:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:46:40,114 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-18 16:46:49,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-18 16:46:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:46:49,378 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2024-09-18 16:46:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 16:46:49,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2024-09-18 16:46:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:46:49,379 INFO L225 Difference]: With dead ends: 122 [2024-09-18 16:46:49,380 INFO L226 Difference]: Without dead ends: 120 [2024-09-18 16:46:49,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 16:46:49,381 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:46:49,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 159 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2024-09-18 16:46:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-18 16:46:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-18 16:46:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-18 16:46:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-09-18 16:46:49,417 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 36 [2024-09-18 16:46:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:46:49,417 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-09-18 16:46:49,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-18 16:46:49,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-09-18 16:46:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:46:49,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:46:49,419 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:46:49,435 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:46:49,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:49,621 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:46:49,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:46:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash 982058431, now seen corresponding path program 1 times [2024-09-18 16:46:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:46:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366421176] [2024-09-18 16:46:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:46:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:46:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:46:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-18 16:46:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 16:46:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 16:46:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 16:46:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 16:46:50,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:46:50,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366421176] [2024-09-18 16:46:50,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366421176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:46:50,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963980250] [2024-09-18 16:46:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:46:50,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:46:50,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:46:50,621 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) [2024-09-18 16:46:50,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:46:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:46:50,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 16:46:50,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:46:51,902 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 21 [2024-09-18 16:46:51,912 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 21 [2024-09-18 16:46:52,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-18 16:46:52,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:46:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:46:52,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:46:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:46:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963980250] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:46:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:46:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-18 16:46:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609760102] [2024-09-18 16:46:57,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:46:57,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:46:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:46:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:46:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-18 16:46:57,289 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:47:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:00,134 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-18 16:47:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 16:47:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 46 [2024-09-18 16:47:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:00,136 INFO L225 Difference]: With dead ends: 127 [2024-09-18 16:47:00,136 INFO L226 Difference]: Without dead ends: 125 [2024-09-18 16:47:00,136 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-18 16:47:00,137 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:00,137 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 143 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-18 16:47:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-18 16:47:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-18 16:47:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 32 states have call successors, (32), 15 states have call predecessors, (32), 17 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-18 16:47:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2024-09-18 16:47:00,166 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 46 [2024-09-18 16:47:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:00,167 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2024-09-18 16:47:00,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:47:00,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2024-09-18 16:47:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:47:00,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:00,168 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:47:00,180 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:47:00,368 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:47:00,369 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:00,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1659555766, now seen corresponding path program 1 times [2024-09-18 16:47:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:00,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066638256] [2024-09-18 16:47:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:47:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:47:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:47:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:47:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-18 16:47:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 16:47:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 16:47:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 16:47:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066638256] [2024-09-18 16:47:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066638256] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:47:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:47:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:47:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314521873] [2024-09-18 16:47:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:47:00,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:47:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:47:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:47:00,973 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 16:47:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:01,959 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2024-09-18 16:47:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:47:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-18 16:47:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:01,961 INFO L225 Difference]: With dead ends: 131 [2024-09-18 16:47:01,961 INFO L226 Difference]: Without dead ends: 129 [2024-09-18 16:47:01,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:47:01,962 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:01,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:47:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-18 16:47:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-09-18 16:47:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 32 states have call successors, (32), 16 states have call predecessors, (32), 18 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-18 16:47:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2024-09-18 16:47:01,993 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 46 [2024-09-18 16:47:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:01,993 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2024-09-18 16:47:01,993 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 16:47:01,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2024-09-18 16:47:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 16:47:01,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:01,994 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:47:01,994 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-18 16:47:01,995 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:01,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash -279405163, now seen corresponding path program 2 times [2024-09-18 16:47:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:01,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477216426] [2024-09-18 16:47:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693758873] [2024-09-18 16:47:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:47:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:02,016 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) [2024-09-18 16:47:02,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:47:02,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:47:02,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:47:02,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-18 16:47:02,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:02,135 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 11 treesize of output 7 [2024-09-18 16:47:02,154 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 11 treesize of output 7 [2024-09-18 16:47:02,174 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 11 treesize of output 7 [2024-09-18 16:47:02,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 163 [2024-09-18 16:47:03,574 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 19 treesize of output 11 [2024-09-18 16:47:03,590 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 19 treesize of output 11 [2024-09-18 16:47:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 16:47:04,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 16:47:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:05,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477216426] [2024-09-18 16:47:05,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:05,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693758873] [2024-09-18 16:47:05,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693758873] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:47:05,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:47:05,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-09-18 16:47:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992379408] [2024-09-18 16:47:05,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:05,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 16:47:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 16:47:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:47:05,356 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 16:47:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:10,191 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2024-09-18 16:47:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:47:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 52 [2024-09-18 16:47:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:10,193 INFO L225 Difference]: With dead ends: 163 [2024-09-18 16:47:10,193 INFO L226 Difference]: Without dead ends: 161 [2024-09-18 16:47:10,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 16:47:10,194 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 162 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:10,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 367 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-18 16:47:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-18 16:47:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-09-18 16:47:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 38 states have call successors, (38), 20 states have call predecessors, (38), 22 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-18 16:47:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2024-09-18 16:47:10,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 52 [2024-09-18 16:47:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:10,234 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2024-09-18 16:47:10,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 16:47:10,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2024-09-18 16:47:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 16:47:10,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:10,235 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:47:10,248 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:47:10,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:10,440 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:10,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:10,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1573894041, now seen corresponding path program 1 times [2024-09-18 16:47:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:10,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39331525] [2024-09-18 16:47:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:10,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:10,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027779495] [2024-09-18 16:47:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:10,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:10,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:10,458 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) [2024-09-18 16:47:10,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:47:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:10,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 16:47:10,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:10,548 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 11 treesize of output 7 [2024-09-18 16:47:10,568 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 11 treesize of output 7 [2024-09-18 16:47:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 16:47:11,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:11,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39331525] [2024-09-18 16:47:11,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027779495] [2024-09-18 16:47:11,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027779495] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:47:11,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:47:11,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-18 16:47:11,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825052139] [2024-09-18 16:47:11,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:11,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:47:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:47:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:47:11,671 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 16:47:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:13,025 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2024-09-18 16:47:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:47:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2024-09-18 16:47:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:13,026 INFO L225 Difference]: With dead ends: 165 [2024-09-18 16:47:13,026 INFO L226 Difference]: Without dead ends: 163 [2024-09-18 16:47:13,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:47:13,027 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:13,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 16:47:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-18 16:47:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-09-18 16:47:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-18 16:47:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-18 16:47:13,070 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 52 [2024-09-18 16:47:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:13,071 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-18 16:47:13,071 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 16:47:13,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-18 16:47:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 16:47:13,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:13,072 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:47:13,084 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:47:13,272 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:13,272 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:13,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1781053975, now seen corresponding path program 3 times [2024-09-18 16:47:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415108098] [2024-09-18 16:47:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:13,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93729236] [2024-09-18 16:47:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:47:13,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:13,295 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) [2024-09-18 16:47:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:47:13,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 16:47:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:47:13,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-18 16:47:13,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:13,405 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 11 treesize of output 7 [2024-09-18 16:47:13,423 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 11 treesize of output 7 [2024-09-18 16:47:13,440 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 11 treesize of output 7 [2024-09-18 16:47:13,459 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 11 treesize of output 7 [2024-09-18 16:47:13,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-18 16:47:14,984 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 19 treesize of output 11 [2024-09-18 16:47:15,004 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 19 treesize of output 11 [2024-09-18 16:47:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-18 16:47:15,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:47:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 16:47:17,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:47:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415108098] [2024-09-18 16:47:17,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:47:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93729236] [2024-09-18 16:47:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93729236] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:47:17,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:47:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-09-18 16:47:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116322522] [2024-09-18 16:47:17,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:47:17,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 16:47:17,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:47:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 16:47:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-18 16:47:17,046 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 19 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-18 16:47:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:47:22,237 INFO L93 Difference]: Finished difference Result 193 states and 219 transitions. [2024-09-18 16:47:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:47:22,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-18 16:47:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:47:22,238 INFO L225 Difference]: With dead ends: 193 [2024-09-18 16:47:22,238 INFO L226 Difference]: Without dead ends: 191 [2024-09-18 16:47:22,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2024-09-18 16:47:22,239 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:47:22,239 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 415 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-09-18 16:47:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-18 16:47:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2024-09-18 16:47:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 115 states have (on average 1.0608695652173914) internal successors, (122), 119 states have internal predecessors, (122), 44 states have call successors, (44), 24 states have call predecessors, (44), 27 states have return successors, (48), 43 states have call predecessors, (48), 40 states have call successors, (48) [2024-09-18 16:47:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 214 transitions. [2024-09-18 16:47:22,294 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 214 transitions. Word has length 58 [2024-09-18 16:47:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:47:22,295 INFO L474 AbstractCegarLoop]: Abstraction has 187 states and 214 transitions. [2024-09-18 16:47:22,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-18 16:47:22,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 214 transitions. [2024-09-18 16:47:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 16:47:22,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:47:22,296 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:47:22,308 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 16:47:22,497 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:22,497 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:47:22,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:47:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831102, now seen corresponding path program 1 times [2024-09-18 16:47:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:47:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119067521] [2024-09-18 16:47:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:47:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:47:22,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106939955] [2024-09-18 16:47:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:47:22,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:47:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:47:22,534 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) [2024-09-18 16:47:22,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:47:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:47:22,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-18 16:47:22,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:47:22,652 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 1 [2024-09-18 16:47:22,707 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 11 treesize of output 7 [2024-09-18 16:47:22,726 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 11 treesize of output 7 [2024-09-18 16:48:03,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-18 16:48:14,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:48:14,338 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 68 treesize of output 72 [2024-09-18 16:48:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:48:14,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:15,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-18 16:48:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119067521] [2024-09-18 16:48:16,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106939955] [2024-09-18 16:48:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106939955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:16,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-18 16:48:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441317832] [2024-09-18 16:48:16,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:16,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 16:48:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 16:48:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=473, Unknown=1, NotChecked=0, Total=552 [2024-09-18 16:48:16,889 INFO L87 Difference]: Start difference. First operand 187 states and 214 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-18 16:48:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:23,651 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2024-09-18 16:48:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 16:48:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2024-09-18 16:48:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:23,653 INFO L225 Difference]: With dead ends: 195 [2024-09-18 16:48:23,653 INFO L226 Difference]: Without dead ends: 193 [2024-09-18 16:48:23,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=256, Invalid=1465, Unknown=1, NotChecked=0, Total=1722 [2024-09-18 16:48:23,654 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:23,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 93 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 627 Invalid, 3 Unknown, 0 Unchecked, 3.3s Time] [2024-09-18 16:48:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-18 16:48:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2024-09-18 16:48:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 122 states have internal predecessors, (125), 44 states have call successors, (44), 25 states have call predecessors, (44), 28 states have return successors, (48), 43 states have call predecessors, (48), 40 states have call successors, (48) [2024-09-18 16:48:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 217 transitions. [2024-09-18 16:48:23,733 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 217 transitions. Word has length 58 [2024-09-18 16:48:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:23,733 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 217 transitions. [2024-09-18 16:48:23,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-18 16:48:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 217 transitions. [2024-09-18 16:48:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-18 16:48:23,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:23,734 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:23,746 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 16:48:23,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 16:48:23,938 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:23,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1703546843, now seen corresponding path program 1 times [2024-09-18 16:48:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:23,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034224381] [2024-09-18 16:48:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818322991] [2024-09-18 16:48:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:23,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:23,955 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) [2024-09-18 16:48:23,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:48:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:24,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 16:48:24,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:24,059 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 11 treesize of output 7 [2024-09-18 16:48:24,075 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 11 treesize of output 7 [2024-09-18 16:48:24,091 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 11 treesize of output 7 [2024-09-18 16:48:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 70 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:48:25,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:26,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034224381] [2024-09-18 16:48:26,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818322991] [2024-09-18 16:48:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818322991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:26,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-18 16:48:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532519428] [2024-09-18 16:48:26,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:26,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:48:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:48:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:48:26,539 INFO L87 Difference]: Start difference. First operand 191 states and 217 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-18 16:48:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:28,124 INFO L93 Difference]: Finished difference Result 199 states and 223 transitions. [2024-09-18 16:48:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:48:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-18 16:48:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:28,126 INFO L225 Difference]: With dead ends: 199 [2024-09-18 16:48:28,126 INFO L226 Difference]: Without dead ends: 197 [2024-09-18 16:48:28,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:48:28,126 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:28,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 89 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 16:48:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-18 16:48:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2024-09-18 16:48:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 121 states have (on average 1.0578512396694215) internal successors, (128), 125 states have internal predecessors, (128), 44 states have call successors, (44), 26 states have call predecessors, (44), 29 states have return successors, (48), 43 states have call predecessors, (48), 40 states have call successors, (48) [2024-09-18 16:48:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 220 transitions. [2024-09-18 16:48:28,220 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 220 transitions. Word has length 64 [2024-09-18 16:48:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:28,220 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 220 transitions. [2024-09-18 16:48:28,220 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-18 16:48:28,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 220 transitions. [2024-09-18 16:48:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:48:28,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:28,221 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:28,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 16:48:28,425 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 16:48:28,426 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:28,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -767700430, now seen corresponding path program 1 times [2024-09-18 16:48:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:28,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974488968] [2024-09-18 16:48:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:28,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271177620] [2024-09-18 16:48:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:28,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:28,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:28,455 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) [2024-09-18 16:48:28,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 16:48:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:28,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 16:48:28,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:28,559 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 11 treesize of output 7 [2024-09-18 16:48:28,575 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 11 treesize of output 7 [2024-09-18 16:48:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-18 16:48:29,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974488968] [2024-09-18 16:48:30,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271177620] [2024-09-18 16:48:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271177620] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:30,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:30,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-18 16:48:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349281464] [2024-09-18 16:48:30,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:30,508 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:48:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:48:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:48:30,509 INFO L87 Difference]: Start difference. First operand 195 states and 220 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 16:48:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:31,945 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2024-09-18 16:48:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:48:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-18 16:48:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:31,947 INFO L225 Difference]: With dead ends: 203 [2024-09-18 16:48:31,947 INFO L226 Difference]: Without dead ends: 199 [2024-09-18 16:48:31,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:48:31,947 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:31,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 98 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 230 Invalid, 3 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 16:48:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-18 16:48:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-18 16:48:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 123 states have (on average 1.048780487804878) internal successors, (129), 126 states have internal predecessors, (129), 44 states have call successors, (44), 27 states have call predecessors, (44), 29 states have return successors, (48), 43 states have call predecessors, (48), 40 states have call successors, (48) [2024-09-18 16:48:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2024-09-18 16:48:32,032 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 70 [2024-09-18 16:48:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:32,032 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2024-09-18 16:48:32,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 16:48:32,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2024-09-18 16:48:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-18 16:48:32,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:32,033 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:32,047 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:32,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:32,234 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:32,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash 593297479, now seen corresponding path program 1 times [2024-09-18 16:48:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:32,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932533839] [2024-09-18 16:48:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:32,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:32,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568912260] [2024-09-18 16:48:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:32,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:48:32,256 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 16:48:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:32,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-18 16:48:32,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:32,364 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 11 treesize of output 7 [2024-09-18 16:48:32,380 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 11 treesize of output 7 [2024-09-18 16:48:32,396 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 11 treesize of output 7 [2024-09-18 16:48:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-18 16:48:34,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:35,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:35,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932533839] [2024-09-18 16:48:35,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:35,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568912260] [2024-09-18 16:48:35,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568912260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:35,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:35,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-18 16:48:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470704382] [2024-09-18 16:48:35,814 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:35,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:48:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:48:35,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:48:35,815 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:48:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:37,240 INFO L93 Difference]: Finished difference Result 199 states and 222 transitions. [2024-09-18 16:48:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:48:37,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-09-18 16:48:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:37,241 INFO L225 Difference]: With dead ends: 199 [2024-09-18 16:48:37,241 INFO L226 Difference]: Without dead ends: 161 [2024-09-18 16:48:37,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:48:37,242 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:37,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 89 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 16:48:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-18 16:48:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-09-18 16:48:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 102 states have internal predecessors, (104), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (42), 37 states have call predecessors, (42), 35 states have call successors, (42) [2024-09-18 16:48:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2024-09-18 16:48:37,313 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 76 [2024-09-18 16:48:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:37,313 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2024-09-18 16:48:37,313 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:48:37,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2024-09-18 16:48:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-18 16:48:37,314 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:37,314 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:37,327 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 16:48:37,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 16:48:37,514 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash 394387029, now seen corresponding path program 1 times [2024-09-18 16:48:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:37,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683357900] [2024-09-18 16:48:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:37,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:38,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:48:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:38,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:48:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:48:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:48:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-18 16:48:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 16:48:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 16:48:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:48:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:48:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-18 16:48:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-18 16:48:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 16:48:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 16:48:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-18 16:48:39,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:39,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683357900] [2024-09-18 16:48:39,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683357900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:39,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759658173] [2024-09-18 16:48:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:39,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:39,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:48:39,310 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 16:48:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-18 16:48:39,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:39,429 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 11 treesize of output 7 [2024-09-18 16:48:39,447 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 11 treesize of output 7 [2024-09-18 16:48:40,682 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 19 treesize of output 11 [2024-09-18 16:48:40,700 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 19 treesize of output 11 [2024-09-18 16:48:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-18 16:48:40,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:42,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-18 16:48:42,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-09-18 16:48:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759658173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:42,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:48:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2024-09-18 16:48:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849288326] [2024-09-18 16:48:42,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:42,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:48:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:48:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:48:42,400 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 16:48:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:44,672 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2024-09-18 16:48:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:48:44,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 82 [2024-09-18 16:48:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:44,673 INFO L225 Difference]: With dead ends: 167 [2024-09-18 16:48:44,673 INFO L226 Difference]: Without dead ends: 165 [2024-09-18 16:48:44,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:48:44,674 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:44,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 118 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 16:48:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-18 16:48:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-09-18 16:48:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 105 states have internal predecessors, (107), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (42), 37 states have call predecessors, (42), 35 states have call successors, (42) [2024-09-18 16:48:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2024-09-18 16:48:44,740 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 82 [2024-09-18 16:48:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:44,740 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2024-09-18 16:48:44,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 16:48:44,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2024-09-18 16:48:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-18 16:48:44,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:44,741 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:44,754 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:44,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 16:48:44,941 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:44,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1573323314, now seen corresponding path program 1 times [2024-09-18 16:48:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:44,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638465282] [2024-09-18 16:48:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:44,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:44,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988631094] [2024-09-18 16:48:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:44,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:44,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:44,968 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:48:44,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 16:48:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:45,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-18 16:48:45,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:45,131 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 11 treesize of output 7 [2024-09-18 16:48:45,209 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 11 treesize of output 7 [2024-09-18 16:48:45,236 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 1 [2024-09-18 16:48:45,248 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 11 treesize of output 7 [2024-09-18 16:48:45,271 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 11 treesize of output 7 [2024-09-18 16:48:48,947 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 27 treesize of output 7 [2024-09-18 16:48:53,535 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 19 treesize of output 11 [2024-09-18 16:48:53,616 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 19 treesize of output 11 [2024-09-18 16:48:53,759 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-09-18 16:48:53,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2024-09-18 16:48:54,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:48:54,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2024-09-18 16:48:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 123 proven. 65 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-18 16:48:56,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:02,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638465282] [2024-09-18 16:49:02,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:02,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988631094] [2024-09-18 16:49:02,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988631094] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:02,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:02,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-18 16:49:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992594727] [2024-09-18 16:49:02,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:02,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:49:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:49:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 16:49:02,019 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-18 16:49:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:13,709 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2024-09-18 16:49:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 16:49:13,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 88 [2024-09-18 16:49:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:13,710 INFO L225 Difference]: With dead ends: 173 [2024-09-18 16:49:13,710 INFO L226 Difference]: Without dead ends: 171 [2024-09-18 16:49:13,711 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2024-09-18 16:49:13,711 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:13,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 117 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 976 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-09-18 16:49:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-18 16:49:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-09-18 16:49:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 108 states have internal predecessors, (110), 38 states have call successors, (38), 23 states have call predecessors, (38), 25 states have return successors, (42), 37 states have call predecessors, (42), 35 states have call successors, (42) [2024-09-18 16:49:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2024-09-18 16:49:13,798 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 88 [2024-09-18 16:49:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:13,798 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2024-09-18 16:49:13,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-18 16:49:13,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2024-09-18 16:49:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-18 16:49:13,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:13,799 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:13,813 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 16:49:13,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 16:49:14,000 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:14,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1152243021, now seen corresponding path program 1 times [2024-09-18 16:49:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:14,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378682460] [2024-09-18 16:49:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:14,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010126713] [2024-09-18 16:49:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:14,036 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:49:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 16:49:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:14,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-09-18 16:49:14,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:14,188 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 48 treesize of output 35 [2024-09-18 16:49:14,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-18 16:49:14,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-18 16:49:14,264 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 11 treesize of output 7 [2024-09-18 16:49:14,295 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 11 treesize of output 7 [2024-09-18 16:49:14,317 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 1 [2024-09-18 16:49:17,676 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 40 treesize of output 17 [2024-09-18 16:50:48,318 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 19 treesize of output 11 [2024-09-18 16:50:48,337 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 47 treesize of output 20 [2024-09-18 16:50:48,382 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 19 treesize of output 11 [2024-09-18 16:50:48,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:48,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31