./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:34:11,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:34:11,225 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:34:11,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:34:11,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:34:11,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:34:11,255 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:34:11,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:34:11,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:34:11,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:34:11,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:34:11,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:34:11,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:34:11,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:34:11,259 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:34:11,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:34:11,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:34:11,260 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:34:11,260 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:34:11,260 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:34:11,261 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:34:11,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:34:11,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:34:11,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:34:11,263 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:34:11,264 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:34:11,264 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:34:11,264 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:34:11,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:34:11,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:34:11,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:34:11,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:34:11,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:34:11,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:34:11,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:34:11,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:34:11,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:34:11,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:34:11,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:34:11,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:34:11,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:34:11,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:34:11,269 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:34:11,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:34:11,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:34:11,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:34:11,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:34:11,521 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:34:11,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-25 11:34:12,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:34:12,881 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:34:12,883 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-25 11:34:12,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9205b71ad/a38de43ae138456792c360287f7f38dc/FLAG3a0ea7463 [2024-09-25 11:34:13,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9205b71ad/a38de43ae138456792c360287f7f38dc [2024-09-25 11:34:13,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:34:13,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:34:13,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:34:13,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:34:13,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:34:13,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cb12b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13, skipping insertion in model container [2024-09-25 11:34:13,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,317 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:34:13,447 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] [2024-09-25 11:34:13,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:34:13,493 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:34:13,501 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] [2024-09-25 11:34:13,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:34:13,541 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:34:13,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13 WrapperNode [2024-09-25 11:34:13,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:34:13,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:34:13,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:34:13,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:34:13,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,568 INFO L138 Inliner]: procedures = 17, calls = 141, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:34:13,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:34:13,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:34:13,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:34:13,570 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:34:13,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,614 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 7, 3, 7, 3, 7, 10, 12, 9, 8, 8, 5, 5]. 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, 3, 1, 3, 1, 2, 2, 1, 1, 2, 2, 2, 2]. [2024-09-25 11:34:13,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:34:13,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:34:13,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:34:13,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:34:13,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (1/1) ... [2024-09-25 11:34:13,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:34:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:13,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:34:13,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:34:13,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:34:13,717 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:34:13,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:34:13,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:34:13,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:34:13,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:34:13,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:34:13,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 11:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-25 11:34:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-25 11:34:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:34:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:34:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:34:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:34:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-25 11:34:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-09-25 11:34:13,724 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:34:13,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:34:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-09-25 11:34:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:34:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 11:34:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-25 11:34:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:34:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:34:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:34:13,853 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:34:13,855 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:34:14,168 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 11:34:14,168 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:34:14,188 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:34:14,189 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 11:34:14,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:34:14 BoogieIcfgContainer [2024-09-25 11:34:14,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:34:14,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:34:14,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:34:14,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:34:14,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:34:13" (1/3) ... [2024-09-25 11:34:14,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2154a1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:34:14, skipping insertion in model container [2024-09-25 11:34:14,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:34:13" (2/3) ... [2024-09-25 11:34:14,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2154a1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:34:14, skipping insertion in model container [2024-09-25 11:34:14,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:34:14" (3/3) ... [2024-09-25 11:34:14,196 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-09-25 11:34:14,209 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:34:14,209 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:34:14,256 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:34:14,262 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;@22dda9d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:34:14,262 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:34:14,265 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) [2024-09-25 11:34:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 11:34:14,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:14,272 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] [2024-09-25 11:34:14,272 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:14,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1338816329, now seen corresponding path program 1 times [2024-09-25 11:34:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:14,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647125091] [2024-09-25 11:34:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:34:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:34:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:34:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:34:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:34:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:34:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647125091] [2024-09-25 11:34:14,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647125091] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:34:14,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:34:14,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:34:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850404331] [2024-09-25 11:34:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:34:14,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:34:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:34:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:34:14,584 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) [2024-09-25 11:34:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:14,619 INFO L93 Difference]: Finished difference Result 102 states and 145 transitions. [2024-09-25 11:34:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:34:14,622 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 [2024-09-25 11:34:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:14,628 INFO L225 Difference]: With dead ends: 102 [2024-09-25 11:34:14,628 INFO L226 Difference]: Without dead ends: 50 [2024-09-25 11:34:14,630 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 [2024-09-25 11:34:14,633 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 [2024-09-25 11:34:14,633 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] [2024-09-25 11:34:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-25 11:34:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-25 11:34:14,657 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) [2024-09-25 11:34:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-25 11:34:14,660 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 40 [2024-09-25 11:34:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:14,660 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-25 11:34:14,660 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) [2024-09-25 11:34:14,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-25 11:34:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 11:34:14,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:14,662 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] [2024-09-25 11:34:14,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:34:14,662 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:14,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -345136705, now seen corresponding path program 1 times [2024-09-25 11:34:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380958346] [2024-09-25 11:34:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863491643] [2024-09-25 11:34:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:14,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:14,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:34:14,780 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:34:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:14,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-25 11:34:14,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:15,015 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 [2024-09-25 11:34:15,029 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 [2024-09-25 11:34:15,036 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 [2024-09-25 11:34:15,102 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 [2024-09-25 11:34:15,120 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 [2024-09-25 11:34:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:34:15,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:34:15,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:15,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380958346] [2024-09-25 11:34:15,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863491643] [2024-09-25 11:34:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863491643] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:34:15,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:34:15,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:34:15,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724554416] [2024-09-25 11:34:15,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:34:15,168 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:34:15,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:15,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:34:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:34:15,169 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) [2024-09-25 11:34:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:15,369 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-09-25 11:34:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:34:15,370 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 [2024-09-25 11:34:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:15,372 INFO L225 Difference]: With dead ends: 70 [2024-09-25 11:34:15,372 INFO L226 Difference]: Without dead ends: 68 [2024-09-25 11:34:15,373 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 [2024-09-25 11:34:15,373 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:15,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 334 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:34:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-25 11:34:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-25 11:34:15,387 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) [2024-09-25 11:34:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-09-25 11:34:15,389 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 40 [2024-09-25 11:34:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:15,389 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-09-25 11:34:15,389 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) [2024-09-25 11:34:15,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-09-25 11:34:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 11:34:15,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:15,391 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] [2024-09-25 11:34:15,404 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 11:34:15,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:15,591 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:15,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash 513632016, now seen corresponding path program 1 times [2024-09-25 11:34:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460058016] [2024-09-25 11:34:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:15,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:34:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:15,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:34:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:15,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:34:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:15,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:34:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:15,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:34:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:16,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 11:34:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:34:16,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460058016] [2024-09-25 11:34:16,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460058016] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152361793] [2024-09-25 11:34:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:16,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:16,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:34:16,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:34:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:16,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 11:34:16,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:16,251 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 [2024-09-25 11:34:16,256 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 15 treesize of output 1 [2024-09-25 11:34:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:34:16,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:34:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152361793] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:34:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:34:16,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2024-09-25 11:34:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119295839] [2024-09-25 11:34:16,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:16,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 11:34:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 11:34:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:34:16,748 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) [2024-09-25 11:34:21,531 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] [2024-09-25 11:34:25,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:34:29,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:34:33,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:34:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:33,883 INFO L93 Difference]: Finished difference Result 131 states and 155 transitions. [2024-09-25 11:34:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 11:34:33,884 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 [2024-09-25 11:34:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:33,886 INFO L225 Difference]: With dead ends: 131 [2024-09-25 11:34:33,886 INFO L226 Difference]: Without dead ends: 119 [2024-09-25 11:34:33,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:34:33,887 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 74 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:33,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 117 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 705 Invalid, 5 Unknown, 0 Unchecked, 16.6s Time] [2024-09-25 11:34:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-25 11:34:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-09-25 11:34:33,907 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) [2024-09-25 11:34:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2024-09-25 11:34:33,912 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 40 [2024-09-25 11:34:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:33,912 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2024-09-25 11:34:33,912 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) [2024-09-25 11:34:33,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2024-09-25 11:34:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:34:33,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:33,913 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] [2024-09-25 11:34:33,930 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 11:34:34,118 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:34,119 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -717787324, now seen corresponding path program 1 times [2024-09-25 11:34:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264288988] [2024-09-25 11:34:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:34,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662093818] [2024-09-25 11:34:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:34,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:34,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:34:34,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:34:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:34,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-09-25 11:34:34,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:34,366 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 [2024-09-25 11:34:34,368 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 [2024-09-25 11:34:34,372 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 [2024-09-25 11:34:34,376 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 [2024-09-25 11:34:34,381 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 [2024-09-25 11:34:34,692 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 [2024-09-25 11:34:34,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:34:34,703 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 [2024-09-25 11:34:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 11:34:34,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:34:35,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:35,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264288988] [2024-09-25 11:34:35,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:35,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662093818] [2024-09-25 11:34:35,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662093818] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:35,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:34:35,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-09-25 11:34:35,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395144816] [2024-09-25 11:34:35,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:34:35,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 11:34:35,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:35,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 11:34:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:34:35,044 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 11:34:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:35,780 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2024-09-25 11:34:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:34:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-09-25 11:34:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:35,782 INFO L225 Difference]: With dead ends: 123 [2024-09-25 11:34:35,782 INFO L226 Difference]: Without dead ends: 121 [2024-09-25 11:34:35,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:34:35,787 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:35,788 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 346 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:34:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-25 11:34:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2024-09-25 11:34:35,817 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) [2024-09-25 11:34:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2024-09-25 11:34:35,820 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 46 [2024-09-25 11:34:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:35,820 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2024-09-25 11:34:35,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 11:34:35,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2024-09-25 11:34:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 11:34:35,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:35,824 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] [2024-09-25 11:34:35,838 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 11:34:36,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:36,025 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:36,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1624706567, now seen corresponding path program 1 times [2024-09-25 11:34:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070455428] [2024-09-25 11:34:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218218724] [2024-09-25 11:34:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:36,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:36,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:34:36,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:34:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:36,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-09-25 11:34:36,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:36,239 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 [2024-09-25 11:34:36,241 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 [2024-09-25 11:34:36,244 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 [2024-09-25 11:34:36,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:34:36,251 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 [2024-09-25 11:34:36,574 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 [2024-09-25 11:34:36,578 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 [2024-09-25 11:34:36,580 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 [2024-09-25 11:34:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:34:36,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 11:34:36,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:36,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070455428] [2024-09-25 11:34:36,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218218724] [2024-09-25 11:34:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218218724] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:36,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:34:36,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-09-25 11:34:36,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155247993] [2024-09-25 11:34:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:34:36,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 11:34:36,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 11:34:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:34:36,842 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) [2024-09-25 11:34:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:37,640 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-25 11:34:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:34:37,641 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 [2024-09-25 11:34:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:37,642 INFO L225 Difference]: With dead ends: 127 [2024-09-25 11:34:37,642 INFO L226 Difference]: Without dead ends: 125 [2024-09-25 11:34:37,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:34:37,644 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:37,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 328 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 11:34:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-25 11:34:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2024-09-25 11:34:37,670 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) [2024-09-25 11:34:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2024-09-25 11:34:37,672 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 52 [2024-09-25 11:34:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:37,672 INFO L474 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2024-09-25 11:34:37,672 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) [2024-09-25 11:34:37,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2024-09-25 11:34:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-25 11:34:37,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:37,673 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] [2024-09-25 11:34:37,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 11:34:37,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:37,877 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:37,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash -525461624, now seen corresponding path program 1 times [2024-09-25 11:34:37,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:37,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148723485] [2024-09-25 11:34:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070591929] [2024-09-25 11:34:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:37,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:37,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:37,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:34:37,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:34:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:38,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-09-25 11:34:38,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:38,229 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 [2024-09-25 11:34:38,235 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 [2024-09-25 11:34:38,337 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 [2024-09-25 11:34:38,347 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 [2024-09-25 11:34:38,354 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 [2024-09-25 11:34:38,360 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 [2024-09-25 11:34:38,369 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 [2024-09-25 11:34:42,550 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 67 treesize of output 39 [2024-09-25 11:34:42,554 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 [2024-09-25 11:34:42,559 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 [2024-09-25 11:34:42,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:34:42,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-09-25 11:34:42,584 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 [2024-09-25 11:34:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:34:42,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:43,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148723485] [2024-09-25 11:34:43,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070591929] [2024-09-25 11:34:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070591929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:34:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 11:34:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185977501] [2024-09-25 11:34:43,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:43,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:34:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:34:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:34:43,010 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-25 11:34:47,077 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] [2024-09-25 11:34:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:48,754 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2024-09-25 11:34:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 11:34:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-09-25 11:34:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:48,756 INFO L225 Difference]: With dead ends: 137 [2024-09-25 11:34:48,756 INFO L226 Difference]: Without dead ends: 135 [2024-09-25 11:34:48,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 11:34:48,757 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:48,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 415 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 747 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-25 11:34:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-25 11:34:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-09-25 11:34:48,799 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) [2024-09-25 11:34:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-25 11:34:48,800 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 58 [2024-09-25 11:34:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:48,801 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-25 11:34:48,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-25 11:34:48,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-25 11:34:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-25 11:34:48,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:48,803 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] [2024-09-25 11:34:48,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 11:34:49,004 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 [2024-09-25 11:34:49,004 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:49,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash 933328821, now seen corresponding path program 1 times [2024-09-25 11:34:49,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:49,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242653011] [2024-09-25 11:34:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:34:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464442245] [2024-09-25 11:34:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:49,044 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) [2024-09-25 11:34:49,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:34:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:49,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-25 11:34:49,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:49,233 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 [2024-09-25 11:34:49,236 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 11 [2024-09-25 11:34:49,237 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 [2024-09-25 11:34:49,239 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 [2024-09-25 11:34:49,242 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 [2024-09-25 11:34:49,246 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 [2024-09-25 11:34:49,438 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 [2024-09-25 11:34:49,443 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 [2024-09-25 11:34:49,485 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 [2024-09-25 11:34:49,488 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 [2024-09-25 11:34:49,490 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 [2024-09-25 11:34:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-25 11:34:49,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:34:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-25 11:34:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242653011] [2024-09-25 11:34:49,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:34:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464442245] [2024-09-25 11:34:49,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464442245] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:34:49,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:34:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-25 11:34:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729753089] [2024-09-25 11:34:49,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:34:49,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:34:49,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:34:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:34:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:34:49,690 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) [2024-09-25 11:34:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:34:50,273 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2024-09-25 11:34:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:34:50,274 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 [2024-09-25 11:34:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:34:50,275 INFO L225 Difference]: With dead ends: 193 [2024-09-25 11:34:50,275 INFO L226 Difference]: Without dead ends: 191 [2024-09-25 11:34:50,276 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 [2024-09-25 11:34:50,276 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 63 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:34:50,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 497 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 11:34:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-25 11:34:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2024-09-25 11:34:50,335 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) [2024-09-25 11:34:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2024-09-25 11:34:50,338 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 68 [2024-09-25 11:34:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:34:50,338 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2024-09-25 11:34:50,338 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) [2024-09-25 11:34:50,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2024-09-25 11:34:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-25 11:34:50,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:34:50,342 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] [2024-09-25 11:34:50,359 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:34:50,542 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 [2024-09-25 11:34:50,543 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:34:50,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:34:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2054935214, now seen corresponding path program 1 times [2024-09-25 11:34:50,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:34:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357096752] [2024-09-25 11:34:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:34:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:34:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:34:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:34:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:34:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:34:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 11:34:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 11:34:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:34:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-25 11:34:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:34:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 11:34:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 11:34:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 11:34:51,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:34:51,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357096752] [2024-09-25 11:34:51,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357096752] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:34:51,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175453273] [2024-09-25 11:34:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:34:51,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:34:51,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:34:51,579 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) [2024-09-25 11:34:51,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:34:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:34:51,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-25 11:34:51,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:34:51,904 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 [2024-09-25 11:34:51,905 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 [2024-09-25 11:34:51,907 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 [2024-09-25 11:34:51,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:34:51,913 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 [2024-09-25 11:34:52,136 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 [2024-09-25 11:34:52,192 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 [2024-09-25 11:35:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 11:35:08,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:35:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175453273] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:35:08,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:35:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 34 [2024-09-25 11:35:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987013879] [2024-09-25 11:35:08,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:35:08,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 11:35:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:35:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 11:35:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1644, Unknown=4, NotChecked=0, Total=1806 [2024-09-25 11:35:08,827 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) [2024-09-25 11:35:12,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:18,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:35:26,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:30,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:34,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:42,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:46,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:35:50,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:35:54,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:35:58,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:36:02,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:36:06,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:36:10,714 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] [2024-09-25 11:36:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:36:10,747 INFO L93 Difference]: Finished difference Result 204 states and 237 transitions. [2024-09-25 11:36:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 11:36:10,747 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 [2024-09-25 11:36:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:36:10,749 INFO L225 Difference]: With dead ends: 204 [2024-09-25 11:36:10,749 INFO L226 Difference]: Without dead ends: 194 [2024-09-25 11:36:10,750 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=543, Invalid=4143, Unknown=6, NotChecked=0, Total=4692 [2024-09-25 11:36:10,751 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 175 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:36:10,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 150 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1105 Invalid, 13 Unknown, 0 Unchecked, 53.0s Time] [2024-09-25 11:36:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-25 11:36:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2024-09-25 11:36:10,817 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) [2024-09-25 11:36:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2024-09-25 11:36:10,819 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 77 [2024-09-25 11:36:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:36:10,819 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2024-09-25 11:36:10,820 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) [2024-09-25 11:36:10,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2024-09-25 11:36:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-25 11:36:10,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:36:10,822 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] [2024-09-25 11:36:10,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 11:36:11,022 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 [2024-09-25 11:36:11,022 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:36:11,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2018468623, now seen corresponding path program 1 times [2024-09-25 11:36:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:36:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702913007] [2024-09-25 11:36:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:11,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:36:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:36:11,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608292279] [2024-09-25 11:36:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:36:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:36:11,074 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) [2024-09-25 11:36:11,075 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:36:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:36:11,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-09-25 11:36:11,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:36:11,415 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 [2024-09-25 11:36:11,418 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 [2024-09-25 11:36:11,423 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 11 [2024-09-25 11:36:11,425 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 [2024-09-25 11:36:11,427 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 [2024-09-25 11:36:11,430 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 [2024-09-25 11:36:11,576 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 [2024-09-25 11:36:11,594 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 [2024-09-25 11:36:11,902 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 [2024-09-25 11:36:11,907 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 [2024-09-25 11:36:11,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-25 11:36:11,914 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 [2024-09-25 11:36:12,106 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 [2024-09-25 11:36:12,108 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 [2024-09-25 11:36:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-25 11:36:12,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:36:12,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:36:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702913007] [2024-09-25 11:36:12,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:36:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608292279] [2024-09-25 11:36:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608292279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:36:12,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:36:12,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-25 11:36:12,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064283658] [2024-09-25 11:36:12,272 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:36:12,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 11:36:12,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:36:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 11:36:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:36:12,273 INFO L87 Difference]: Start difference. First operand 192 states and 224 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-25 11:36:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:36:13,272 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2024-09-25 11:36:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:36:13,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 81 [2024-09-25 11:36:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:36:13,275 INFO L225 Difference]: With dead ends: 287 [2024-09-25 11:36:13,275 INFO L226 Difference]: Without dead ends: 283 [2024-09-25 11:36:13,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:36:13,276 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 11:36:13,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 380 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 11:36:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-25 11:36:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2024-09-25 11:36:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 173 states have (on average 1.0867052023121386) internal successors, (188), 182 states have internal predecessors, (188), 60 states have call successors, (60), 35 states have call predecessors, (60), 45 states have return successors, (83), 61 states have call predecessors, (83), 57 states have call successors, (83) [2024-09-25 11:36:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 331 transitions. [2024-09-25 11:36:13,378 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 331 transitions. Word has length 81 [2024-09-25 11:36:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:36:13,379 INFO L474 AbstractCegarLoop]: Abstraction has 279 states and 331 transitions. [2024-09-25 11:36:13,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-25 11:36:13,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 331 transitions. [2024-09-25 11:36:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-25 11:36:13,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:36:13,381 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] [2024-09-25 11:36:13,398 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 11:36:13,582 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 [2024-09-25 11:36:13,583 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:36:13,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1820476014, now seen corresponding path program 2 times [2024-09-25 11:36:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:36:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417240201] [2024-09-25 11:36:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:36:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:36:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379612422] [2024-09-25 11:36:13,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:36:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:36:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:36:13,640 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) [2024-09-25 11:36:13,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:36:13,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:36:13,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:36:13,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-09-25 11:36:13,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:36:13,958 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 [2024-09-25 11:36:14,086 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 [2024-09-25 11:36:14,100 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 [2024-09-25 11:36:14,106 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 [2024-09-25 11:36:14,111 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 [2024-09-25 11:36:14,552 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 [2024-09-25 11:36:14,555 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 [2024-09-25 11:36:14,572 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 [2024-09-25 11:36:14,616 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 [2024-09-25 11:36:14,919 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 [2024-09-25 11:36:14,921 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 [2024-09-25 11:36:14,925 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 [2024-09-25 11:36:14,941 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 [2024-09-25 11:36:15,555 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 [2024-09-25 11:36:15,556 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 [2024-09-25 11:36:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 11:36:15,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:36:15,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:36:15,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417240201] [2024-09-25 11:36:15,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:36:15,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379612422] [2024-09-25 11:36:15,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379612422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:36:15,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:36:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-25 11:36:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471264152] [2024-09-25 11:36:15,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:36:15,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 11:36:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:36:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 11:36:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-09-25 11:36:15,781 INFO L87 Difference]: Start difference. First operand 279 states and 331 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:36:19,839 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] [2024-09-25 11:36:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:36:21,720 INFO L93 Difference]: Finished difference Result 368 states and 431 transitions. [2024-09-25 11:36:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 11:36:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 87 [2024-09-25 11:36:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:36:21,723 INFO L225 Difference]: With dead ends: 368 [2024-09-25 11:36:21,723 INFO L226 Difference]: Without dead ends: 364 [2024-09-25 11:36:21,724 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 11:36:21,724 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 117 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:36:21,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 399 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1023 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-25 11:36:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-09-25 11:36:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 356. [2024-09-25 11:36:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 223 states have (on average 1.0896860986547086) internal successors, (243), 234 states have internal predecessors, (243), 75 states have call successors, (75), 46 states have call predecessors, (75), 57 states have return successors, (101), 75 states have call predecessors, (101), 72 states have call successors, (101) [2024-09-25 11:36:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 419 transitions. [2024-09-25 11:36:21,858 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 419 transitions. Word has length 87 [2024-09-25 11:36:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:36:21,858 INFO L474 AbstractCegarLoop]: Abstraction has 356 states and 419 transitions. [2024-09-25 11:36:21,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:36:21,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 419 transitions. [2024-09-25 11:36:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-25 11:36:21,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:36:21,860 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] [2024-09-25 11:36:21,876 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 11:36:22,061 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 [2024-09-25 11:36:22,062 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:36:22,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:36:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 441955027, now seen corresponding path program 3 times [2024-09-25 11:36:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:36:22,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807036588] [2024-09-25 11:36:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:36:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:36:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:36:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296490679] [2024-09-25 11:36:22,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:36:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:36:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:36:22,116 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) [2024-09-25 11:36:22,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:36:22,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 11:36:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:36:22,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 360 conjuncts are in the unsatisfiable core [2024-09-25 11:36:22,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:36:22,821 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 [2024-09-25 11:36:22,849 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 [2024-09-25 11:36:22,989 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 [2024-09-25 11:36:22,998 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 [2024-09-25 11:36:23,011 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 [2024-09-25 11:36:23,016 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 21 treesize of output 17 [2024-09-25 11:36:23,022 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 [2024-09-25 11:36:23,028 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 [2024-09-25 11:36:23,040 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 [2024-09-25 11:36:29,334 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 [2024-09-25 11:36:29,375 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 [2024-09-25 11:36:29,379 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 [2024-09-25 11:36:30,265 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 [2024-09-25 11:36:43,606 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-25 11:36:43,606 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 25 [2024-09-25 11:36:43,618 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 40 treesize of output 28 [2024-09-25 11:36:43,644 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-09-25 11:36:43,644 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 51 treesize of output 54 [2024-09-25 11:36:43,754 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 [2024-09-25 11:36:51,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:51,832 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 173 treesize of output 137 [2024-09-25 11:36:51,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:51,859 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 123 treesize of output 111 [2024-09-25 11:36:51,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:51,919 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 80 treesize of output 88 [2024-09-25 11:36:51,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:51,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 76 [2024-09-25 11:36:51,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:36:51,994 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 114 treesize of output 86 [2024-09-25 11:36:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-25 11:36:52,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:36:53,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:36:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807036588] [2024-09-25 11:36:53,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:36:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296490679] [2024-09-25 11:36:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296490679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:36:53,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:36:53,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-25 11:36:53,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34973753] [2024-09-25 11:36:53,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:36:53,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:36:53,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:36:53,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:36:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=935, Unknown=3, NotChecked=0, Total=1056 [2024-09-25 11:36:53,092 INFO L87 Difference]: Start difference. First operand 356 states and 419 transitions. Second operand has 30 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 11 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 11:36:57,183 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] [2024-09-25 11:37:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:37:18,116 INFO L93 Difference]: Finished difference Result 360 states and 422 transitions. [2024-09-25 11:37:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 11:37:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 11 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) Word has length 93 [2024-09-25 11:37:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:37:18,118 INFO L225 Difference]: With dead ends: 360 [2024-09-25 11:37:18,118 INFO L226 Difference]: Without dead ends: 358 [2024-09-25 11:37:18,119 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=280, Invalid=2473, Unknown=3, NotChecked=0, Total=2756 [2024-09-25 11:37:18,119 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 96 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:37:18,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 410 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1295 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2024-09-25 11:37:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-09-25 11:37:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2024-09-25 11:37:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 223 states have (on average 1.0807174887892377) internal successors, (241), 234 states have internal predecessors, (241), 75 states have call successors, (75), 46 states have call predecessors, (75), 57 states have return successors, (101), 75 states have call predecessors, (101), 72 states have call successors, (101) [2024-09-25 11:37:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 417 transitions. [2024-09-25 11:37:18,326 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 417 transitions. Word has length 93 [2024-09-25 11:37:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:37:18,326 INFO L474 AbstractCegarLoop]: Abstraction has 356 states and 417 transitions. [2024-09-25 11:37:18,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 11 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 11:37:18,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:37:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 417 transitions. [2024-09-25 11:37:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-25 11:37:18,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:37:18,327 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] [2024-09-25 11:37:18,338 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 11:37:18,528 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 [2024-09-25 11:37:18,528 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:37:18,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:37:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1308971429, now seen corresponding path program 1 times [2024-09-25 11:37:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:37:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460245173] [2024-09-25 11:37:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:37:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:37:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:37:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083078061] [2024-09-25 11:37:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:37:18,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:37:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:37:18,585 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) [2024-09-25 11:37:18,590 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:37:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:37:19,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-09-25 11:37:19,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:37:19,016 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 15 treesize of output 1 [2024-09-25 11:37:19,018 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 [2024-09-25 11:37:19,055 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 [2024-09-25 11:37:19,058 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 [2024-09-25 11:37:19,062 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 [2024-09-25 11:37:19,068 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 [2024-09-25 11:37:19,073 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 [2024-09-25 11:37:19,078 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 [2024-09-25 11:37:19,379 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 [2024-09-25 11:37:19,388 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 [2024-09-25 11:37:19,681 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 [2024-09-25 11:37:19,694 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 [2024-09-25 11:37:20,483 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 [2024-09-25 11:37:20,517 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 [2024-09-25 11:37:20,629 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 [2024-09-25 11:37:20,635 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 33 treesize of output 25 [2024-09-25 11:37:28,996 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 [2024-09-25 11:37:29,000 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 13 [2024-09-25 11:37:29,010 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 [2024-09-25 11:37:29,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:37:29,022 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 39 treesize of output 35 [2024-09-25 11:37:29,072 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 [2024-09-25 11:37:29,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:37:29,079 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 29 treesize of output 25 [2024-09-25 11:37:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-25 11:37:29,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:37:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:37:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460245173] [2024-09-25 11:37:31,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:37:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083078061] [2024-09-25 11:37:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083078061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:37:31,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:37:31,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-09-25 11:37:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97456425] [2024-09-25 11:37:31,949 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:37:31,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 11:37:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:37:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 11:37:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1124, Unknown=2, NotChecked=0, Total=1260 [2024-09-25 11:37:31,950 INFO L87 Difference]: Start difference. First operand 356 states and 417 transitions. Second operand has 31 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 11 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-25 11:37:36,017 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] [2024-09-25 11:37:40,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:37:44,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:37:50,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:37:54,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:37:58,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:03,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:07,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:38:11,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:19,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:23,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:28,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:38:32,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:36,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:40,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 11:38:44,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:38:48,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:38:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:48,820 INFO L93 Difference]: Finished difference Result 387 states and 459 transitions. [2024-09-25 11:38:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-25 11:38:48,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 11 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) Word has length 107 [2024-09-25 11:38:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:48,824 INFO L225 Difference]: With dead ends: 387 [2024-09-25 11:38:48,824 INFO L226 Difference]: Without dead ends: 385 [2024-09-25 11:38:48,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=400, Invalid=3503, Unknown=3, NotChecked=0, Total=3906 [2024-09-25 11:38:48,825 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 139 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 129 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:48,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 188 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1146 Invalid, 17 Unknown, 0 Unchecked, 69.8s Time] [2024-09-25 11:38:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-25 11:38:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 362. [2024-09-25 11:38:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 228 states have (on average 1.0833333333333333) internal successors, (247), 239 states have internal predecessors, (247), 75 states have call successors, (75), 48 states have call predecessors, (75), 58 states have return successors, (103), 77 states have call predecessors, (103), 73 states have call successors, (103) [2024-09-25 11:38:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 425 transitions. [2024-09-25 11:38:49,075 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 425 transitions. Word has length 107 [2024-09-25 11:38:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:49,075 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 425 transitions. [2024-09-25 11:38:49,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 11 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-25 11:38:49,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 425 transitions. [2024-09-25 11:38:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-25 11:38:49,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:49,077 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1, 1] [2024-09-25 11:38:49,094 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:49,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:49,277 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:49,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:49,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1111257249, now seen corresponding path program 1 times [2024-09-25 11:38:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:49,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196694281] [2024-09-25 11:38:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:49,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140889964] [2024-09-25 11:38:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:49,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:49,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:49,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:38:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:49,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-09-25 11:38:49,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:49,583 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