./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-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 f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-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 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:13:12,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:13:12,311 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:13:12,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:13:12,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:13:12,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:13:12,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:13:12,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:13:12,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:13:12,355 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:13:12,356 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:13:12,356 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:13:12,357 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:13:12,358 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:13:12,359 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:13:12,359 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:13:12,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:13:12,360 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:13:12,360 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:13:12,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:13:12,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:13:12,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:13:12,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:13:12,363 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:13:12,364 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:13:12,364 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:13:12,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:13:12,364 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:13:12,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:13:12,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:13:12,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:13:12,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:13:12,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:13:12,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:13:12,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:13:12,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:13:12,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:13:12,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:13:12,368 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:13:12,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:13:12,369 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:13:12,369 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:13:12,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:13:12,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:13:12,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:13:12,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:13:12,650 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:13:12,651 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:13:12,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-20 13:13:14,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:13:14,190 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:13:14,191 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-20 13:13:14,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0555d20b3/2853111d18a44754badb9149d37a1654/FLAGda9b4e561 [2024-09-20 13:13:14,585 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0555d20b3/2853111d18a44754badb9149d37a1654 [2024-09-20 13:13:14,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:13:14,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:13:14,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:13:14,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:13:14,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:13:14,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165ae548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14, skipping insertion in model container [2024-09-20 13:13:14,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,628 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:13:14,787 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_egcd2-ll.c[1037,1050] [2024-09-20 13:13:14,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:13:14,841 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:13:14,855 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_egcd2-ll.c[1037,1050] [2024-09-20 13:13:14,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:13:14,908 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:13:14,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14 WrapperNode [2024-09-20 13:13:14,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:13:14,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:13:14,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:13:14,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:13:14,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,932 INFO L138 Inliner]: procedures = 17, calls = 141, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:13:14,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:13:14,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:13:14,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:13:14,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:13:14,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,951 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,974 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 7, 7, 10, 7, 3, 3, 8, 5, 8, 5, 12, 9]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 2, 3, 2, 3, 1, 1, 2, 2, 2, 2, 1, 1]. [2024-09-20 13:13:14,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,994 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:14,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:15,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:13:15,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:13:15,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:13:15,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:13:15,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (1/1) ... [2024-09-20 13:13:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:13:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:15,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 13:13:15,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 13:13:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:13:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 13:13:15,080 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 13:13:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:13:15,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:13:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:13:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:13:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:13:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:13:15,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:13:15,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:13:15,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 13:13:15,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 13:13:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-20 13:13:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-20 13:13:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-20 13:13:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-20 13:13:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:13:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-09-20 13:13:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-09-20 13:13:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:13:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:13:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-09-20 13:13:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-09-20 13:13:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:13:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:13:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 13:13:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 13:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-20 13:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-20 13:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-20 13:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-20 13:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-20 13:13:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:13:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:13:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:13:15,255 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:13:15,274 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:13:15,628 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 13:13:15,628 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:13:15,654 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:13:15,655 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 13:13:15,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:13:15 BoogieIcfgContainer [2024-09-20 13:13:15,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:13:15,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:13:15,659 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:13:15,662 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:13:15,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:13:14" (1/3) ... [2024-09-20 13:13:15,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c29b5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:13:15, skipping insertion in model container [2024-09-20 13:13:15,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:14" (2/3) ... [2024-09-20 13:13:15,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c29b5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:13:15, skipping insertion in model container [2024-09-20 13:13:15,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:13:15" (3/3) ... [2024-09-20 13:13:15,665 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-09-20 13:13:15,681 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:13:15,681 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:13:15,749 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:13:15,755 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;@51b01bed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:13:15,755 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:13:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 13:13:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:13:15,771 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:15,771 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1] [2024-09-20 13:13:15,772 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:15,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1338816329, now seen corresponding path program 1 times [2024-09-20 13:13:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121357677] [2024-09-20 13:13:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:13:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:13:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:13:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121357677] [2024-09-20 13:13:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121357677] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:13:16,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:13:16,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 13:13:16,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210009429] [2024-09-20 13:13:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:16,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 13:13:16,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 13:13:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 13:13:16,146 INFO L87 Difference]: Start difference. First operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:13:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:16,190 INFO L93 Difference]: Finished difference Result 102 states and 145 transitions. [2024-09-20 13:13:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 13:13:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-09-20 13:13:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:16,202 INFO L225 Difference]: With dead ends: 102 [2024-09-20 13:13:16,202 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 13:13:16,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 13:13:16,212 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:16,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:13:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 13:13:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 13:13:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 31 states have internal predecessors, (31), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 13:13:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-20 13:13:16,252 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 40 [2024-09-20 13:13:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:16,253 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-20 13:13:16,253 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:13:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-20 13:13:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:13:16,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:16,256 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1] [2024-09-20 13:13:16,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:13:16,257 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:16,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -345136705, now seen corresponding path program 1 times [2024-09-20 13:13:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:16,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889808213] [2024-09-20 13:13:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636683259] [2024-09-20 13:13:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:16,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:16,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:16,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:13:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:16,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 13:13:16,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:16,854 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 [2024-09-20 13:13:16,882 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 [2024-09-20 13:13:16,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:16,972 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 [2024-09-20 13:13:16,977 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 15 treesize of output 7 [2024-09-20 13:13:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:13:17,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:13:17,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:17,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889808213] [2024-09-20 13:13:17,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636683259] [2024-09-20 13:13:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636683259] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:13:17,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:13:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:13:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755377635] [2024-09-20 13:13:17,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:17,032 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:13:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:17,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:13:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:13:17,033 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 13:13:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:17,298 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-09-20 13:13:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:13:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2024-09-20 13:13:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:17,301 INFO L225 Difference]: With dead ends: 70 [2024-09-20 13:13:17,302 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 13:13:17,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:13:17,303 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:17,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 334 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:13:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 13:13:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-20 13:13:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-20 13:13:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-09-20 13:13:17,324 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 40 [2024-09-20 13:13:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:17,325 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-09-20 13:13:17,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 13:13:17,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-09-20 13:13:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:13:17,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:17,329 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1] [2024-09-20 13:13:17,347 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:17,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:17,533 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:17,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash 513632016, now seen corresponding path program 1 times [2024-09-20 13:13:17,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947901941] [2024-09-20 13:13:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:13:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:13:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:13:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:13:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947901941] [2024-09-20 13:13:18,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947901941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088741882] [2024-09-20 13:13:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:18,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:18,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:18,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:13:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:18,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 13:13:18,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:18,453 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 [2024-09-20 13:13:18,459 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 [2024-09-20 13:13:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:13:18,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:13:19,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088741882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:13:19,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:13:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2024-09-20 13:13:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25592911] [2024-09-20 13:13:19,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:19,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:13:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:13:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:13:19,097 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 25 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-20 13:13:24,078 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 [0] [2024-09-20 13:13:28,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:13:32,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:13:36,464 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 [0] [2024-09-20 13:13:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:36,518 INFO L93 Difference]: Finished difference Result 131 states and 155 transitions. [2024-09-20 13:13:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:13:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 40 [2024-09-20 13:13:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:36,522 INFO L225 Difference]: With dead ends: 131 [2024-09-20 13:13:36,522 INFO L226 Difference]: Without dead ends: 119 [2024-09-20 13:13:36,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 13:13:36,528 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 74 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:36,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 117 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 701 Invalid, 9 Unknown, 0 Unchecked, 16.8s Time] [2024-09-20 13:13:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-20 13:13:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-09-20 13:13:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 30 states have call successors, (30), 14 states have call predecessors, (30), 15 states have return successors, (33), 27 states have call predecessors, (33), 28 states have call successors, (33) [2024-09-20 13:13:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2024-09-20 13:13:36,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 40 [2024-09-20 13:13:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:36,565 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2024-09-20 13:13:36,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-20 13:13:36,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2024-09-20 13:13:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 13:13:36,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:36,574 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:36,593 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:13:36,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:36,779 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:36,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -717787324, now seen corresponding path program 1 times [2024-09-20 13:13:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789937873] [2024-09-20 13:13:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:36,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453512487] [2024-09-20 13:13:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:36,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:36,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:36,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:13:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:37,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-09-20 13:13:37,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:37,053 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 [2024-09-20 13:13:37,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:37,071 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 [2024-09-20 13:13:37,078 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 [2024-09-20 13:13:37,495 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 [2024-09-20 13:13:37,500 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 15 treesize of output 7 [2024-09-20 13:13:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:13:37,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789937873] [2024-09-20 13:13:37,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453512487] [2024-09-20 13:13:37,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453512487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:37,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:37,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-20 13:13:37,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514727116] [2024-09-20 13:13:37,641 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:37,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:13:37,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:13:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:13:37,642 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 13:13:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:38,105 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2024-09-20 13:13:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:13:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-09-20 13:13:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:38,108 INFO L225 Difference]: With dead ends: 125 [2024-09-20 13:13:38,108 INFO L226 Difference]: Without dead ends: 123 [2024-09-20 13:13:38,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-09-20 13:13:38,109 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 33 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:38,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 289 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:13:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-20 13:13:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2024-09-20 13:13:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 73 states have (on average 1.095890410958904) internal successors, (80), 77 states have internal predecessors, (80), 30 states have call successors, (30), 15 states have call predecessors, (30), 16 states have return successors, (33), 27 states have call predecessors, (33), 28 states have call successors, (33) [2024-09-20 13:13:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2024-09-20 13:13:38,146 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 46 [2024-09-20 13:13:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:38,146 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2024-09-20 13:13:38,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 13:13:38,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2024-09-20 13:13:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 13:13:38,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:38,148 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:38,169 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:38,348 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:38,349 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:38,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1624706567, now seen corresponding path program 1 times [2024-09-20 13:13:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484447456] [2024-09-20 13:13:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:38,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245223152] [2024-09-20 13:13:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:38,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:38,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:38,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:13:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:38,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-20 13:13:38,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:38,621 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 [2024-09-20 13:13:38,628 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 [2024-09-20 13:13:38,674 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 [2024-09-20 13:13:38,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:38,689 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 [2024-09-20 13:13:39,344 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 [2024-09-20 13:13:39,354 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 [2024-09-20 13:13:39,358 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 22 treesize of output 10 [2024-09-20 13:13:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 13:13:39,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:13:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484447456] [2024-09-20 13:13:39,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245223152] [2024-09-20 13:13:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245223152] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:39,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 21 [2024-09-20 13:13:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815417059] [2024-09-20 13:13:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:39,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:13:39,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:13:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:13:39,831 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 13:13:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:40,836 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-20 13:13:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:13:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2024-09-20 13:13:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:40,839 INFO L225 Difference]: With dead ends: 127 [2024-09-20 13:13:40,839 INFO L226 Difference]: Without dead ends: 125 [2024-09-20 13:13:40,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:13:40,843 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:40,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 328 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 13:13:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-20 13:13:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2024-09-20 13:13:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 30 states have call successors, (30), 16 states have call predecessors, (30), 17 states have return successors, (33), 27 states have call predecessors, (33), 28 states have call successors, (33) [2024-09-20 13:13:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2024-09-20 13:13:40,898 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 52 [2024-09-20 13:13:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:40,899 INFO L474 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2024-09-20 13:13:40,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 13:13:40,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2024-09-20 13:13:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:13:40,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:40,901 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2024-09-20 13:13:40,919 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:13:41,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:41,101 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:41,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -525461624, now seen corresponding path program 1 times [2024-09-20 13:13:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994562061] [2024-09-20 13:13:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:41,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:41,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284953516] [2024-09-20 13:13:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:41,153 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) [2024-09-20 13:13:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:13:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:41,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-20 13:13:41,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:41,468 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 [2024-09-20 13:13:41,470 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 [2024-09-20 13:13:41,597 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 [2024-09-20 13:13:41,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:41,619 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 51 treesize of output 47 [2024-09-20 13:13:41,629 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 21 treesize of output 17 [2024-09-20 13:13:41,650 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 [2024-09-20 13:13:41,657 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 21 treesize of output 17 [2024-09-20 13:13:41,667 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 [2024-09-20 13:13:41,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:43,516 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 25 treesize of output 17 [2024-09-20 13:14:02,577 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 63 treesize of output 35 [2024-09-20 13:14:02,586 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 66 treesize of output 34 [2024-09-20 13:14:02,593 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 17 treesize of output 9 [2024-09-20 13:14:02,608 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 17 treesize of output 9 [2024-09-20 13:14:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:14:02,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:03,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994562061] [2024-09-20 13:14:03,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284953516] [2024-09-20 13:14:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284953516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:03,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:03,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 13:14:03,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880138397] [2024-09-20 13:14:03,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:03,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 13:14:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 13:14:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=526, Unknown=1, NotChecked=0, Total=600 [2024-09-20 13:14:03,075 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:14:07,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:10,858 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2024-09-20 13:14:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 13:14:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-09-20 13:14:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:10,861 INFO L225 Difference]: With dead ends: 137 [2024-09-20 13:14:10,861 INFO L226 Difference]: Without dead ends: 135 [2024-09-20 13:14:10,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=189, Invalid=1292, Unknown=1, NotChecked=0, Total=1482 [2024-09-20 13:14:10,862 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:10,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 410 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 636 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-09-20 13:14:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-20 13:14:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-09-20 13:14:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 86 states have internal predecessors, (89), 30 states have call successors, (30), 18 states have call predecessors, (30), 19 states have return successors, (33), 27 states have call predecessors, (33), 28 states have call successors, (33) [2024-09-20 13:14:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-20 13:14:10,949 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 58 [2024-09-20 13:14:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:10,951 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-20 13:14:10,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:14:10,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-20 13:14:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 13:14:10,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:10,953 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:10,964 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:11,157 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 [2024-09-20 13:14:11,157 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:11,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash 933328821, now seen corresponding path program 1 times [2024-09-20 13:14:11,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:11,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957590150] [2024-09-20 13:14:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:11,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728679673] [2024-09-20 13:14:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:11,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:11,215 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) [2024-09-20 13:14:11,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:14:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-09-20 13:14:11,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:11,547 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 [2024-09-20 13:14:11,549 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 [2024-09-20 13:14:11,555 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 [2024-09-20 13:14:11,559 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 15 treesize of output 11 [2024-09-20 13:14:11,809 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 [2024-09-20 13:14:11,814 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 35 treesize of output 21 [2024-09-20 13:14:11,877 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 25 treesize of output 17 [2024-09-20 13:14:11,883 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 21 treesize of output 13 [2024-09-20 13:14:11,885 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 17 treesize of output 9 [2024-09-20 13:14:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 13:14:11,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 13:14:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957590150] [2024-09-20 13:14:12,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728679673] [2024-09-20 13:14:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728679673] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:14:12,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:14:12,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-20 13:14:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761844291] [2024-09-20 13:14:12,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:12,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:14:12,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:14:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:14:12,095 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 13:14:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:12,769 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2024-09-20 13:14:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:14:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 68 [2024-09-20 13:14:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:12,771 INFO L225 Difference]: With dead ends: 193 [2024-09-20 13:14:12,771 INFO L226 Difference]: Without dead ends: 191 [2024-09-20 13:14:12,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:14:12,772 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:12,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 493 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:14:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-20 13:14:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2024-09-20 13:14:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 121 states have internal predecessors, (124), 40 states have call successors, (40), 25 states have call predecessors, (40), 28 states have return successors, (49), 39 states have call predecessors, (49), 38 states have call successors, (49) [2024-09-20 13:14:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2024-09-20 13:14:12,867 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 68 [2024-09-20 13:14:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:12,867 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2024-09-20 13:14:12,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 13:14:12,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2024-09-20 13:14:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 13:14:12,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:12,869 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:12,886 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:13,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:13,073 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:13,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2054935214, now seen corresponding path program 1 times [2024-09-20 13:14:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:13,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851503946] [2024-09-20 13:14:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:14:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:14:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:14:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:14:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:14:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:14:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:14:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:14:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:14:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:14:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:14:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 13:14:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:14:14,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:14,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851503946] [2024-09-20 13:14:14,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851503946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:14,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601741409] [2024-09-20 13:14:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:14,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:14,500 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) [2024-09-20 13:14:14,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:14:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:14,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 13:14:14,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:14,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:14,978 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 26 treesize of output 26 [2024-09-20 13:14:14,983 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 [2024-09-20 13:14:14,987 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 [2024-09-20 13:14:14,989 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 [2024-09-20 13:14:15,340 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 [2024-09-20 13:14:15,405 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 27 treesize of output 19 [2024-09-20 13:14:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:14:31,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601741409] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:32,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:14:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 34 [2024-09-20 13:14:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583851541] [2024-09-20 13:14:32,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:32,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 13:14:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 13:14:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1644, Unknown=4, NotChecked=0, Total=1806 [2024-09-20 13:14:32,307 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 34 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 13 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2024-09-20 13:14:36,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:41,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:14:50,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:54,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:58,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:06,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:10,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:15:14,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:18,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 13:15:22,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:26,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:30,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:34,848 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 [0] [2024-09-20 13:15:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:34,866 INFO L93 Difference]: Finished difference Result 204 states and 237 transitions. [2024-09-20 13:15:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 13:15:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 13 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 77 [2024-09-20 13:15:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:34,869 INFO L225 Difference]: With dead ends: 204 [2024-09-20 13:15:34,869 INFO L226 Difference]: Without dead ends: 194 [2024-09-20 13:15:34,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=543, Invalid=4143, Unknown=6, NotChecked=0, Total=4692 [2024-09-20 13:15:34,871 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 106 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:34,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 164 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1267 Invalid, 14 Unknown, 0 Unchecked, 53.3s Time] [2024-09-20 13:15:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-20 13:15:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2024-09-20 13:15:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 125 states have internal predecessors, (128), 41 states have call successors, (41), 25 states have call predecessors, (41), 31 states have return successors, (55), 41 states have call predecessors, (55), 39 states have call successors, (55) [2024-09-20 13:15:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2024-09-20 13:15:34,961 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 77 [2024-09-20 13:15:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:34,961 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2024-09-20 13:15:34,961 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 13 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2024-09-20 13:15:34,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2024-09-20 13:15:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 13:15:34,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:34,963 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:34,978 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 13:15:35,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:35,168 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:35,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2018468623, now seen corresponding path program 1 times [2024-09-20 13:15:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:35,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37680593] [2024-09-20 13:15:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:35,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796844244] [2024-09-20 13:15:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:35,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:35,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:35,247 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) [2024-09-20 13:15:35,248 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:15:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:35,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 270 conjuncts are in the unsatisfiable core [2024-09-20 13:15:35,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:35,568 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 15 treesize of output 1 [2024-09-20 13:15:35,571 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 [2024-09-20 13:15:35,629 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 [2024-09-20 13:15:35,634 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 [2024-09-20 13:15:35,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:35,652 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 11 treesize of output 7 [2024-09-20 13:15:35,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:36,117 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 [2024-09-20 13:15:36,135 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 15 treesize of output 11 [2024-09-20 13:15:36,194 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 11 treesize of output 7 [2024-09-20 13:15:37,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:37,611 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 51 treesize of output 47 [2024-09-20 13:15:37,646 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-20 13:15:37,646 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 49 treesize of output 60 [2024-09-20 13:15:37,653 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 25 treesize of output 17 [2024-09-20 13:15:37,743 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:15:37,743 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 26 treesize of output 29 [2024-09-20 13:15:37,754 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 [2024-09-20 13:15:39,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:39,243 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 77 treesize of output 97 [2024-09-20 13:15:39,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:39,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 114 [2024-09-20 13:15:39,293 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 56 treesize of output 36 [2024-09-20 13:15:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:15:39,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:15:39,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37680593] [2024-09-20 13:15:39,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:15:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796844244] [2024-09-20 13:15:39,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796844244] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:15:39,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:15:39,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 13:15:39,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590344472] [2024-09-20 13:15:39,704 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:15:39,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:15:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:15:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-09-20 13:15:39,705 INFO L87 Difference]: Start difference. First operand 192 states and 224 transitions. Second operand has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-20 13:15:43,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:51,281 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 [0] [2024-09-20 13:15:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:51,384 INFO L93 Difference]: Finished difference Result 280 states and 328 transitions. [2024-09-20 13:15:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 13:15:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 81 [2024-09-20 13:15:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:51,387 INFO L225 Difference]: With dead ends: 280 [2024-09-20 13:15:51,387 INFO L226 Difference]: Without dead ends: 274 [2024-09-20 13:15:51,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 13:15:51,389 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 99 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:51,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 462 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1241 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2024-09-20 13:15:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-09-20 13:15:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 269. [2024-09-20 13:15:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 168 states have (on average 1.0833333333333333) internal successors, (182), 176 states have internal predecessors, (182), 57 states have call successors, (57), 35 states have call predecessors, (57), 43 states have return successors, (78), 57 states have call predecessors, (78), 55 states have call successors, (78) [2024-09-20 13:15:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 317 transitions. [2024-09-20 13:15:51,542 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 317 transitions. Word has length 81 [2024-09-20 13:15:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:51,543 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 317 transitions. [2024-09-20 13:15:51,544 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-20 13:15:51,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 317 transitions. [2024-09-20 13:15:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 13:15:51,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:51,547 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:51,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:15:51,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:51,748 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:51,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1820476014, now seen corresponding path program 2 times [2024-09-20 13:15:51,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:51,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225680745] [2024-09-20 13:15:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:51,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341063761] [2024-09-20 13:15:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:15:51,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:51,813 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) [2024-09-20 13:15:51,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:15:52,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:15:52,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:15:52,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-09-20 13:15:52,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:52,227 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 [2024-09-20 13:15:52,308 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 [2024-09-20 13:15:52,327 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 [2024-09-20 13:15:52,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:52,342 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 [2024-09-20 13:15:52,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:52,838 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 [2024-09-20 13:15:52,859 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 [2024-09-20 13:15:56,904 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 11 treesize of output 7 [2024-09-20 13:16:13,234 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 27 treesize of output 19 [2024-09-20 13:16:13,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:13,250 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 [2024-09-20 13:16:13,256 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 [2024-09-20 13:16:13,797 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 [2024-09-20 13:16:13,800 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 15 treesize of output 7 [2024-09-20 13:16:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 13:16:13,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:14,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225680745] [2024-09-20 13:16:14,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341063761] [2024-09-20 13:16:14,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341063761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:14,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 13:16:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116734270] [2024-09-20 13:16:14,014 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:14,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:16:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:16:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=571, Unknown=5, NotChecked=0, Total=650 [2024-09-20 13:16:14,016 INFO L87 Difference]: Start difference. First operand 269 states and 317 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (17), 9 states have call predecessors, (17), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 13:16:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:27,642 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2024-09-20 13:16:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:16:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (17), 9 states have call predecessors, (17), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 87 [2024-09-20 13:16:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:27,645 INFO L225 Difference]: With dead ends: 284 [2024-09-20 13:16:27,645 INFO L226 Difference]: Without dead ends: 282 [2024-09-20 13:16:27,645 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=154, Invalid=1170, Unknown=8, NotChecked=0, Total=1332 [2024-09-20 13:16:27,646 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:27,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 392 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 13:16:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-09-20 13:16:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2024-09-20 13:16:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.0804597701149425) internal successors, (188), 182 states have internal predecessors, (188), 57 states have call successors, (57), 37 states have call predecessors, (57), 45 states have return successors, (78), 57 states have call predecessors, (78), 55 states have call successors, (78) [2024-09-20 13:16:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 323 transitions. [2024-09-20 13:16:27,816 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 323 transitions. Word has length 87 [2024-09-20 13:16:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:27,816 INFO L474 AbstractCegarLoop]: Abstraction has 277 states and 323 transitions. [2024-09-20 13:16:27,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (17), 9 states have call predecessors, (17), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 13:16:27,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 323 transitions. [2024-09-20 13:16:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-20 13:16:27,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:27,817 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-09-20 13:16:27,833 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:28,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 13:16:28,018 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:28,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 441955027, now seen corresponding path program 3 times [2024-09-20 13:16:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34923020] [2024-09-20 13:16:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:28,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009277708] [2024-09-20 13:16:28,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:16:28,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:28,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:28,112 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) [2024-09-20 13:16:28,114 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:16:28,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 13:16:28,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:28,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 295 conjuncts are in the unsatisfiable core [2024-09-20 13:16:28,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:28,688 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 15 treesize of output 1 [2024-09-20 13:16:28,692 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 [2024-09-20 13:16:28,798 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 [2024-09-20 13:16:28,803 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 [2024-09-20 13:16:28,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:28,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:28,834 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 21 treesize of output 17 [2024-09-20 13:16:29,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:29,747 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 [2024-09-20 13:16:29,758 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 [2024-09-20 13:16:33,861 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 11 treesize of output 7 [2024-09-20 13:16:35,016 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 [2024-09-20 13:16:35,022 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 [2024-09-20 13:16:35,056 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-09-20 13:16:35,056 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 38 treesize of output 45 [2024-09-20 13:16:35,066 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 [2024-09-20 13:16:35,135 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 [2024-09-20 13:16:41,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:41,901 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 88 treesize of output 96 [2024-09-20 13:16:41,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:41,925 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 75 treesize of output 79 [2024-09-20 13:16:41,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:41,963 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 56 treesize of output 64 [2024-09-20 13:16:41,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:41,980 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 110 treesize of output 82 [2024-09-20 13:16:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 13:16:42,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34923020] [2024-09-20 13:16:42,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009277708] [2024-09-20 13:16:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009277708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:42,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:42,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 13:16:42,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938963991] [2024-09-20 13:16:42,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:42,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:16:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:16:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=400, Unknown=1, NotChecked=0, Total=462 [2024-09-20 13:16:42,444 INFO L87 Difference]: Start difference. First operand 277 states and 323 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 13:16:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:49,398 INFO L93 Difference]: Finished difference Result 282 states and 327 transitions. [2024-09-20 13:16:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:16:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 93 [2024-09-20 13:16:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:49,401 INFO L225 Difference]: With dead ends: 282 [2024-09-20 13:16:49,401 INFO L226 Difference]: Without dead ends: 280 [2024-09-20 13:16:49,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=129, Invalid=862, Unknown=1, NotChecked=0, Total=992 [2024-09-20 13:16:49,404 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:49,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 490 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-20 13:16:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-09-20 13:16:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2024-09-20 13:16:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.0689655172413792) internal successors, (186), 182 states have internal predecessors, (186), 57 states have call successors, (57), 37 states have call predecessors, (57), 45 states have return successors, (78), 57 states have call predecessors, (78), 55 states have call successors, (78) [2024-09-20 13:16:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 321 transitions. [2024-09-20 13:16:49,638 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 321 transitions. Word has length 93 [2024-09-20 13:16:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:49,638 INFO L474 AbstractCegarLoop]: Abstraction has 277 states and 321 transitions. [2024-09-20 13:16:49,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 13:16:49,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 321 transitions. [2024-09-20 13:16:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-20 13:16:49,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:49,641 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:16:49,661 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:49,841 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:16:49,842 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:49,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1308971429, now seen corresponding path program 1 times [2024-09-20 13:16:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:49,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681915114] [2024-09-20 13:16:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:49,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7663728] [2024-09-20 13:16:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:49,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:49,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:49,921 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) [2024-09-20 13:16:49,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:16:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:50,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-09-20 13:16:50,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:50,504 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 [2024-09-20 13:16:50,574 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 [2024-09-20 13:16:50,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:50,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:50,602 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 [2024-09-20 13:16:50,613 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 [2024-09-20 13:16:50,622 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 [2024-09-20 13:16:51,002 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 11 treesize of output 7 [2024-09-20 13:16:51,009 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 11 treesize of output 7 [2024-09-20 13:16:51,326 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 [2024-09-20 13:16:51,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:17:01,932 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 11 treesize of output 7